U.S. Secretary of State Mike Pompeo met with Saudi Arabia's King Salman on Thursday in a visit focused primarily on discussing shared security concerns about regional rival Iran.

Ahead of his arrival in the capital Riyadh, Pompeo said he'd also raise with the Saudi leadership concerns about human rights and the cases of dual Saudi-American citizenswho are either imprisoned in the kingdom or barred from traveling abroad.

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US Secretary of State Mike Pompeo, left, meets with Saudi King Salman, right, at the Royal Court in Riyadh, Saudi Arabia, Thursday Feb. 20, 2020. Pompeo has said that during his time in Saudi Arabia, he will speak with the kingdom's leadership about security issues, threats posed by Iran, the economic relationship between the two countries, and issues of human rights. (Andrew Caballero-ReynoldsPool via AP)

U.S. Secretary of State Mike Pompeo met with Saudi Arabia's King Salman on Thursday in a visit focused primarily on discussing shared security concerns about regional rival Iran.

Saudi King Salman, left, before his meeting with US Secretary of State Mike Pompeo, at the Royal Court in Riyadh, Saudi Arabia, Thursday Feb. 20, 2020. Pompeo has said that during his time in Saudi Arabia, he will speak with the kingdom's leadership about security issues, threats posed by Iran, the economic relationship between the two countries, and issues of human rights. (Andrew Caballero-ReynoldsPool via AP)

The U.S. military presence in the kingdom at the Prince Sultan Air Base includes a squadron of U.S. Air Force F-15E fighters that fly daily missions over Iraq and Syria and two American Patriot missile batteries prepared to knock down any Iranian attack against the Saudi kingdom.

US Secretary of State Mike Pompeo talks with Saudi Foreign Minister Faisal Bin Farhan al-Saud at the Royal Court in Riyadh on Thursday Feb. 20, 2020. (Andrew Caballero-ReynoldsPool via AP)

Saudi Arabia is a decades-long U.S. ally, but that relationship was rocked by the 2018 killing of Saudi dissident and Washington Post columnist Jamal Khashoggi in the Saudi consulate in Istanbul. Congress has also harshly criticized Saudi Arabia for its war in Yemen, which has led to the world's worst humanitarian disaster.

US Secretary of State Mike Pompeo, right, and Saudi ambassador to the United States Princess Reema Bint Bandar, as they wait before holding a roundtable coffee meeting with Saudi Women Leaders at Princess Reema's Palace in Riyadh, Saudi Arabia, Thursday Feb. 20, 2020. Pompeo has said that during his time in Saudi Arabia, he will speak with the kingdom's leadership about security issues, threats posed by Iran, the economic relationship between the two countries, and issues of human rights. (Andrew Caballero-ReynoldsPool via AP)

“The pressure campaign continues. It's not just an economic pressure campaign, it's diplomatic pressures, isolation through diplomacy, as well,” he told reporters before arriving in Saudi Arabiafrom Ethiopiaon Wednesday.

U.S. Secretary of State Mike Pompeo, center left, and his wife Susan, center right, meet with family members at the U.S. embassy in Riyadh Thursday, Feb. 20, 2020. (Andrew Caballero-ReynoldsPool Photo via AP)

U.S. Secretary of State Mike Pompeo, center left, and his wife Susan, center right, meet with family members at the U.S. embassy in Riyadh Thursday, Feb. 20, 2020. (Andrew Caballero-ReynoldsPool Photo via AP)

Following his meeting at the royal palace with the king, Pompeo headed to a Saudi air base where some 2,500 U.S. troops are stationed in response to threats from Iran.

US Secretary of State Mike Pompeo, left, meets with Saudi King Salman, right, at the Royal Court in Riyadh, Saudi Arabia, Thursday Feb. 20, 2020. Pompeo has said that during his time in Saudi Arabia, he will speak with the kingdom's leadership about security issues, threats posed by Iran, the economic relationship between the two countries, and issues of human rights. (Andrew Caballero-ReynoldsPool via AP)

US Secretary of State Mike Pompeo, left, meets with Saudi King Salman, right, at the Royal Court in Riyadh, Saudi Arabia, Thursday Feb. 20, 2020. Pompeo has said that during his time in Saudi Arabia, he will speak with the kingdom's leadership about security issues, threats posed by Iran, the economic relationship between the two countries, and issues of human rights. (Andrew Caballero-ReynoldsPool via AP)

The U.S. military presence in the kingdom at the Prince Sultan Air Base includes a squadron of U.S. Air Force F-15E fighters that fly daily missions over Iraq and Syria and two American Patriot missile batteries prepared to knock down any Iranian attack against the Saudi kingdom.

American troops were sent to Saudi Arabia last summer as part of the Trump administration's efforts to beef up the United States' military presence in the Middle East in response to escalating tensions between Washington and Tehran following President Donald Trump's decision to pull the U.S. out of Iran's nuclear agreement with world powers and impose sanctions on the country.

Saudi Arabia and the U.S. have blamed Iran for an attack last summer against Saudi oil facilities that temporarily halved the kingdom's daily crude production. Iran denies involvement and its allied Yemeni rebel Houthi group says they were behind the attack.

Saudi King Salman, left, before his meeting with US Secretary of State Mike Pompeo, at the Royal Court in Riyadh, Saudi Arabia, Thursday Feb. 20, 2020. Pompeo has said that during his time in Saudi Arabia, he will speak with the kingdom's leadership about security issues, threats posed by Iran, the economic relationship between the two countries, and issues of human rights. (Andrew Caballero-ReynoldsPool via AP)

Saudi King Salman, left, before his meeting with US Secretary of State Mike Pompeo, at the Royal Court in Riyadh, Saudi Arabia, Thursday Feb. 20, 2020. Pompeo has said that during his time in Saudi Arabia, he will speak with the kingdom's leadership about security issues, threats posed by Iran, the economic relationship between the two countries, and issues of human rights. (Andrew Caballero-ReynoldsPool via AP)

Saudi Arabia is a decades-long U.S. ally, but that relationship was rocked by the 2018 killing of Saudi dissident and Washington Post columnist Jamal Khashoggi in the Saudi consulate in Istanbul. Congress has also harshly criticized Saudi Arabia for its war in Yemen, which has led to the world's worst humanitarian disaster.

The kingdom, however, remains the biggest buyer of U.S. military arms and its young Crown Prince Mohammed bin Salman has cultivated a relationship with Trump's son-in-law and senior adviser on Mideast policy, Jared Kushner.

Pompeo has said the U.S. is prepared to come to the table to talk with Iran, but is not rushing to do so.

US Secretary of State Mike Pompeo talks with Saudi Foreign Minister Faisal Bin Farhan al-Saud at the Royal Court in Riyadh on Thursday Feb. 20, 2020. (Andrew Caballero-ReynoldsPool via AP)

US Secretary of State Mike Pompeo talks with Saudi Foreign Minister Faisal Bin Farhan al-Saud at the Royal Court in Riyadh on Thursday Feb. 20, 2020. (Andrew Caballero-ReynoldsPool via AP)

“The pressure campaign continues. It's not just an economic pressure campaign, it's diplomatic pressures, isolation through diplomacy, as well,” he told reporters before arriving in Saudi Arabiafrom Ethiopiaon Wednesday.

During his time in Riyadh, Pompeo also met Thursday with a group of Saudi women business leaders at the residence of Saudi Arabia's ambassador to the U.S., Princess Reema bint Bandar Al Saud.Pompeo departs Friday for Oman, a close U.S. ally that has ties with both Saudi Arabia and Iran.

US Secretary of State Mike Pompeo, right, and Saudi ambassador to the United States Princess Reema Bint Bandar, as they wait before holding a roundtable coffee meeting with Saudi Women Leaders at Princess Reema's Palace in Riyadh, Saudi Arabia, Thursday Feb. 20, 2020. Pompeo has said that during his time in Saudi Arabia, he will speak with the kingdom's leadership about security issues, threats posed by Iran, the economic relationship between the two countries, and issues of human rights. (Andrew Caballero-ReynoldsPool via AP)

US Secretary of State Mike Pompeo, right, and Saudi ambassador to the United States Princess Reema Bint Bandar, as they wait before holding a roundtable coffee meeting with Saudi Women Leaders at Princess Reema's Palace in Riyadh, Saudi Arabia, Thursday Feb. 20, 2020. Pompeo has said that during his time in Saudi Arabia, he will speak with the kingdom's leadership about security issues, threats posed by Iran, the economic relationship between the two countries, and issues of human rights. (Andrew Caballero-ReynoldsPool via AP)

U.S. Secretary of State Mike Pompeo, center left, and his wife Susan, center right, meet with family members at the U.S. embassy in Riyadh Thursday, Feb. 20, 2020. (Andrew Caballero-ReynoldsPool Photo via AP)

U.S. Secretary of State Mike Pompeo, center left, and his wife Susan, center right, meet with family members at the U.S. embassy in Riyadh Thursday, Feb. 20, 2020. (Andrew Caballero-ReynoldsPool Photo via AP)