WASHINGTON: A US Navy patrol ship fired warning shots at an Iranian Revolu-tionary Guard vessel in the Persian Gulf Tuesday after it approached within 150 yards (137 meters), a US defense official said.

“The IRGCN boat was coming in at a high rate of speed. It did not respond to any signals, they did not respond to any bridge-to-bridge calls, they felt there was no choice except to fire the warning shots,” the defense official told AFP on condition of anonymity.—AFP