A bridge struck by U.S. airstrikes on Thursday is seen in the town of Karaj, west of Tehran, Iran, Friday.
A bridge struck by U.S. airstrikes on Thursday is seen in the town of Karaj, west of Tehran, Iran, Friday. (Vahid Salemi | AP)

Iran state media have reported an American F-15 jet has gone down in Iran.

A U.S. official who was not authorized to speak publicly has confirmed the reports and added that a search is underway by U.S. forces.

This is a breaking news story and will be updated.

Iran hits Gulf refineries as Trump warns U.S. will attack Iranian bridges, power plants

Iran said one of the longest bridges linking Tehran to the city of Karaj was destroyed overnight, while Iranian missiles and drones hit Israel, Saudi Arabia, the United Arab Emirates and Kuwait.