President Donald Trump told reporters Thursday that a U.S. warship has downed an Iranian drone in the Strait of Hormuz. The incident, which he said occurred Thursday, is a further escalation of tensions between the two countries that have resulted in Trump approving and then canceling airstrikes against Iran last month.

Although the details of the latest incident are still unclear, Trump claimed that the USS Boxer warship took defensive action against an Iranian drone that was within 1,000 yards of the vessel. Trump claimed that the drone did not stand down and was threatening the ships safety, and was therefore immediately destroyed.

This is the latest of many provocative and hostile actions by Iran against vessels operating in international waters, Trump said. The United States reserves the right to defend our personnel, our facilities and interests, and calls upon all nations to condemn Irans attempts to disrupt freedom of navigation and global commerce.

Irans Foreign Minister Javad Zarif claimed that he had no information about Iran losing a drone. The drone was not shot out of the sky, a U.S. official told CNN , but instead was brought down using the USS Boxers counter-drone jamming equipment.