Story highlights The Iranians did not respond to any warnings from the US ship

The Navy ship then fired warning shots into the water over concerns about the possibility of a collision

Washington (CNN) A US Navy ship fired warning shots at an armed Iranian patrol boat Tuesday in the northern end of the Persian Gulf, according to two US defense officials.

The Iranian boat is believed to have been operated by the Iranian Revolutionary Guard Corps, according to a defense official familiar with details of the incident. The officials said the Iranian boat approached and came within 150 yards of the USS Thunderbolt, a US Navy patrol ship.

The USS Thunderbolt was accompanied by the USS Vella Gulf, which is a Ticonderoga-class guided missile cruiser, and two US Coast Guard vessels at the time.

The Iranians did not respond to any warnings from the US ship, including radio calls, firing of flares and five short blasts from the US Navy ship's whistle, which is the internationally recognized communications signal for danger, the officials said.

The Navy ship then fired warning shots into the water over concerns about the possibility of a collision, one of the officials said.

Read More