
The US military shot down four Iranian drones and struck a control center in the southern port city of Bandar Abbas to prevent a fifth drone launch, US officials said on Wednesday.
The operation marked Washington's second day of "defensive" strikes against Iran this week amid fragile ceasefire talks over the nearly three-month conflict.
"These actions were measured, purely defensive, and intended to maintain the ceasefire," an official told Reuters news agency.
The officials said the drones posed a threat near the Strait of Hormuz.
Earlier, the Pentagon said overnight US strikes on Monday targeted Iranian missile launch sites and mine-laying boats that threatened US forces and shipping lanes.
Iran fires warning shots at ships attempting to cross Strait of Hormuz
Iranian forces fired warning shots at four ships attempting to cross the Strait of Hormuz without authorization, Iran's IRIB news agency reported on Thursday.
"They were warned, but after they ignored the warning, warning shots were fired at them, forcing them to return," IRIB said in a post on Telegram.