Trump says he's instructed Navy to 'destroy' any Iranian gunboats harassing US ships

President Trump said Wednesday that he's instructed the U.S. Navy to "shoot down and destroy" any Iranian gunboats harassing American ships, in the wake of a tense encounter in the Persian Gulf.

"I have instructed the United States Navy to shoot down and destroy any and all Iranian gunboats if they harass our ships at sea," Trump tweeted.

The encounter happened last week. Six U.S. Navy warships were conducting drills with US Army Apache attack helicopters in international waters off Iran last Wednesday when they were repeatedly harassed by 11 Iranian Islamic Revolutionary Guard Navy vessels, the U.S. Navy’s 5th Fleet reported.

The Iranian ships repeatedly crossed in front and behind the U.S. vessels at extremely close range and high speeds, including multiple crossings of one ship, the Puller, with a 50-yard closest point of approach and within 10 yards of another ship, the Maui's, bow, a 5th Fleet statement said.

The Navy also reported that the USS Paul Hamilton, USS Firebolt, USS Sirocco and USCGC Wrangell, as well as the Puller and Maui, were involved in the exercises.

The U.S. crews responded by issuing multiple warnings via radio—including five short blasts from the ships’ horns and long-grange acoustic noise maker devices, but received no response from the IRGCN, the Navy’s 5th Fleet said in a statement.

After approximately an hour, the Iranian vessels responded to the radio queries, before maneuvering away from the U.S. ships and increasing the distance between them, according to the Navy.