Iranian state TV says the Islamic republic flew a surveillance drone over a U.S. aircraft carrier during a naval exercise.
The report on January 29 said the drone took pictures of the vessel, but did not elaborate.
There was no immediate reaction from the U.S. Navy’s 5th Fleet, which oversees the Persian Gulf from Bahrain.
The nuclear-powered USS Harry S. Truman is in the Gulf supporting operations against the Islamic State extremist group in Iraq and Syria.
Iran began a naval drill earlier this week over a 3-million-square-kilometer area including parts of the Strait of Hormuz, the Gulf of Oman, and the Indian Ocean.
On January 27, Iran said its navy warned a U.S. warship to leave an area of the naval drill. The U.S. Navy denied being affected.
The warning was the first such incident since 10 U.S. sailors were briefly captured by Iran on January 13 after drifting into Iranian territorial waters.
On January 28, U.S. Defense Secretary Ash Carter said he was “very, very angry” that Iran had videotaped the U.S. sailors surrendering.