Iran state TV airs video that shows encounter between Revolutionary Guard's navy and USS Theodore Roosevelt

Iran's state TV has broadcast footage purporting to show a close encounter between the Revolutionary Guard's navy and the USS Theodore Roosevelt early this year.

PressTV's website says the encounter occurred March 21 in the strategic Strait of Hormuz in the Persian Gulf, the passageway for nearly a third of all oil traded by sea. The TV agency says the video was aired Saturday as part of a documentary.

The footage is likely meant as a show of strength amid new U.S. sanctions on Iran and the Trump administration plans to bring Iranian oil exports down to zero.