Kuwait says it has raised security levels at its ports given ongoing regional tensions following an attack on Saudi Arabia.

The state-run KUNA news agency reported the decision Friday, quoting Kuwait's minister of commerce and industry as making the announcement.

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In this photo opportunity during a trip organized by Saudi information ministry, workers replace a damaged tube in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019 after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. Iran denies that. Yemen's Houthi rebels claimed the assault. (AP PhotoAmr Nabil)

Kuwait says it has raised security levels at its ports given ongoing regional tensions following an attack on Saudi Arabia.

In this photo opportunity during a trip organized by Saudi information ministry, workers fix the damage in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. (AP PhotoAmr Nabil)

Small, oil-rich Kuwait separately has told its military to be on heightened alert since the Sept. 14 attack on Saudi Arabia.

In this photo opportunity during a trip organized by Saudi information ministry, media film holes caused by fragments of a missile in a damaged pipe in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. Iran denies that. Yemen's Houthi rebels claimed the assault. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, media film holes caused by fragments of a missile in a damaged pipe in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. Iran denies that. Yemen's Houthi rebels claimed the assault. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, a worker wears safety gear in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, a worker wears safety gear in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, workers work in front of the recent attack Aramco's oil processing facility in Khurais, near Dammam in the Kingdom's Eastern Province, Friday, Sept. 20, 2019. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, workers work in front of the recent attack Aramco's oil processing facility in Khurais, near Dammam in the Kingdom's Eastern Province, Friday, Sept. 20, 2019. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, a man stands in front of the Khurais oil field in Khurais, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. Iran denies that. Yemen's Houthi rebels claimed the assault. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, a man stands in front of the Khurais oil field in Khurais, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. Iran denies that. Yemen's Houthi rebels claimed the assault. (AP PhotoAmr Nabil)

Khaled al-Roudhan said it affected both commercial ports and oil facilities.

In this photo opportunity during a trip organized by Saudi information ministry, workers replace a damaged tube in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019 after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. Iran denies that. Yemen's Houthi rebels claimed the assault. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, workers replace a damaged tube in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019 after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. Iran denies that. Yemen's Houthi rebels claimed the assault. (AP PhotoAmr Nabil)

Small, oil-rich Kuwait separately has told its military to be on heightened alert since the Sept. 14 attack on Saudi Arabia.

That attack halved the kingdom's oil production and has disrupted global energy supplies.

The U.S. alleges Iran carried out the attack. Saudi Arabia says the assault was "unquestionably sponsored by Iran." Iran denies being involved in the attack and warns any retaliatory strike on it by the U.S. or Saudi Arabia will result in "an all-out war."

In this photo opportunity during a trip organized by Saudi information ministry, workers fix the damage in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, workers fix the damage in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, media film holes caused by fragments of a missile in a damaged pipe in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. Iran denies that. Yemen's Houthi rebels claimed the assault. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, media film holes caused by fragments of a missile in a damaged pipe in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. Iran denies that. Yemen's Houthi rebels claimed the assault. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, a worker wears safety gear in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, a worker wears safety gear in the Aramco's Khurais oil field, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, workers work in front of the recent attack Aramco's oil processing facility in Khurais, near Dammam in the Kingdom's Eastern Province, Friday, Sept. 20, 2019. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, workers work in front of the recent attack Aramco's oil processing facility in Khurais, near Dammam in the Kingdom's Eastern Province, Friday, Sept. 20, 2019. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, a man stands in front of the Khurais oil field in Khurais, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. Iran denies that. Yemen's Houthi rebels claimed the assault. (AP PhotoAmr Nabil)

In this photo opportunity during a trip organized by Saudi information ministry, a man stands in front of the Khurais oil field in Khurais, Saudi Arabia, Friday, Sept. 20, 2019, after it was hit during Sept. 14 attack. Saudi officials brought journalists Friday to see the damage done in an attack the U.S. alleges Iran carried out. Iran denies that. Yemen's Houthi rebels claimed the assault. (AP PhotoAmr Nabil)