A U.S. Defense Department spokesman says Iran's accusation that the US fabricated video and audio of Iranian boats confronting American warships is absurd.

State-run TV in Iran quotes an official in Iran's Revolutionary Guards as saying the video released by the Pentagon of the incident was compiled using file footage, and that the audio was fabricated.

The video shows small Iranian boats swarming around U.S. warships.

Iranian State TV did not give the name of the Revolutionary Guard official, and did not offer more details about how the official knew the footage was fabricated.