A top Russian admiral complained Thursday about increased NATO military activities near the country's borders, describing them as a threat to regional security.

Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet, said that NATO navy ships' presence in the Barents Sea and the Norwegian Sea have reached levels unseen since World War II.

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Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet speaks to journalists on the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser at Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. A top Russian admiral has griped about increased NATO's military activities near the country's borders, describing them as a threat to regional security. Moiseyev said that NATO navy ships' presence in the Barents Sea and the Norwegian Sea have reached levels unseen since World War II. (AP PhotoAlexander Zemlianichenko)

A top Russian admiral complained Thursday about increased NATO military activities near the country's borders, describing them as a threat to regional security.

Russian sailors stand guard near the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

“Such actions are provocative and have a negative impact on regional security,” Moiseyev said.

A view from on board the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, with a ship's cannon on the right at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Moscow has repeatedly voiced concern over the deployment of NATO forces near Russian borders. Russia and the alliance also have blamed each other for conducting destabilizing military exercises near the borders.

Russian sailors salute as they stand guard at the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Russian sailors salute as they stand guard at the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

A Russian sailor stands guard on board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

A Russian sailor stands guard on board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Russian sailors stand guard at the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Russian sailors stand guard at the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

A view from the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, is seen at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

A view from the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, is seen at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Russian naval officers stand guard on board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Russian naval officers stand guard on board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet gestures while speaking to journalists on the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser at Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. A top Russian admiral has griped about increased NATO's military activities near the country's borders, describing them as a threat to regional security. Moiseyev said that NATO navy ships' presence in the Barents Sea and the Norwegian Sea have reached levels unseen since World War II. (AP PhotoAlexander Zemlianichenko)

Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet gestures while speaking to journalists on the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser at Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. A top Russian admiral has griped about increased NATO's military activities near the country's borders, describing them as a threat to regional security. Moiseyev said that NATO navy ships' presence in the Barents Sea and the Norwegian Sea have reached levels unseen since World War II. (AP PhotoAlexander Zemlianichenko)

The Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, is seen at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

The Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, is seen at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet arrives to speak to journalists on the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser at Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. A top Russian admiral has griped about increased NATO's military activities near the country's borders, describing them as a threat to regional security. Moiseyev said that NATO navy ships' presence in the Barents Sea and the Norwegian Sea have reached levels unseen since World War II. (AP PhotoAlexander Zemlianichenko)

Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet arrives to speak to journalists on the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser at Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. A top Russian admiral has griped about increased NATO's military activities near the country's borders, describing them as a threat to regional security. Moiseyev said that NATO navy ships' presence in the Barents Sea and the Norwegian Sea have reached levels unseen since World War II. (AP PhotoAlexander Zemlianichenko)

Speaking to reporters onboard the Northern Fleet's flagship, the Pyotr Veliky (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Moiseyev charged that NATO drills have edged closer to Russian borders, and noted increasingly frequent flights by U.S. nuclear-capable strategic bombers.

Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet speaks to journalists on the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser at Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. A top Russian admiral has griped about increased NATO's military activities near the country's borders, describing them as a threat to regional security. Moiseyev said that NATO navy ships' presence in the Barents Sea and the Norwegian Sea have reached levels unseen since World War II. (AP PhotoAlexander Zemlianichenko)

Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet speaks to journalists on the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser at Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. A top Russian admiral has griped about increased NATO's military activities near the country's borders, describing them as a threat to regional security. Moiseyev said that NATO navy ships' presence in the Barents Sea and the Norwegian Sea have reached levels unseen since World War II. (AP PhotoAlexander Zemlianichenko)

“Such actions are provocative and have a negative impact on regional security,” Moiseyev said.

He voiced particular concern about the U.S. military assets on the territory of NATO ally Norway that borders Russia, charging that it has led to an “increase of the conflict potential in the Arctic.”

Ties between Russia and the West have plummeted to post-Cold War lows after the 2014 Russian annexation of Ukraine’s Crimean Peninsula and Moscow’s support for a separatist insurgency in eastern Ukraine.

Russian sailors stand guard near the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Russian sailors stand guard near the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Moscow has repeatedly voiced concern over the deployment of NATO forces near Russian borders. Russia and the alliance also have blamed each other for conducting destabilizing military exercises near the borders.

Last month, a massive build-up of Russian troops alongside the Ukrainian border fueled concerns in Ukraine and the West. The Kremlin rejected Western worries, charging that the troops don't threaten anyone, but it also warned Ukrainian authorities against trying to use force to reclaim control of the rebel east.

A view from on board the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, with a ship's cannon on the right at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

A view from on board the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, with a ship's cannon on the right at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Russian sailors salute as they stand guard at the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Russian sailors salute as they stand guard at the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

A Russian sailor stands guard on board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

A Russian sailor stands guard on board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Russian sailors stand guard at the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Russian sailors stand guard at the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

A view from the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, is seen at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

A view from the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, is seen at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Russian naval officers stand guard on board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Russian naval officers stand guard on board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet gestures while speaking to journalists on the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser at Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. A top Russian admiral has griped about increased NATO's military activities near the country's borders, describing them as a threat to regional security. Moiseyev said that NATO navy ships' presence in the Barents Sea and the Norwegian Sea have reached levels unseen since World War II. (AP PhotoAlexander Zemlianichenko)

Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet gestures while speaking to journalists on the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser at Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. A top Russian admiral has griped about increased NATO's military activities near the country's borders, describing them as a threat to regional security. Moiseyev said that NATO navy ships' presence in the Barents Sea and the Norwegian Sea have reached levels unseen since World War II. (AP PhotoAlexander Zemlianichenko)

The Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, is seen at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

The Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser, is seen at its Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet griped Thursday about increased NATO's military activities near the country's borders, describing them as a threat to regional security. (AP PhotoAlexander Zemlianichenko)

Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet arrives to speak to journalists on the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser at Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. A top Russian admiral has griped about increased NATO's military activities near the country's borders, describing them as a threat to regional security. Moiseyev said that NATO navy ships' presence in the Barents Sea and the Norwegian Sea have reached levels unseen since World War II. (AP PhotoAlexander Zemlianichenko)

Adm. Alexander Moiseyev, the commander of Russia's Northern Fleet arrives to speak to journalists on the board of the Northern Fleet's flagship, the Pyotr Veilikiy (Peter the Great) missile cruiser at Arctic base of Severomorsk, Russia, Thursday, May 13, 2021. A top Russian admiral has griped about increased NATO's military activities near the country's borders, describing them as a threat to regional security. Moiseyev said that NATO navy ships' presence in the Barents Sea and the Norwegian Sea have reached levels unseen since World War II. (AP PhotoAlexander Zemlianichenko)