Iran's state news agency says an Iranian fighter jet has crashed into the Oman Sea off the country's southeastern coast.
Iran says the F-4 Phantom jet crashed at 12:45 p.m. local time (0915 UTC) Monday in waters near the Iranian port city of Konarak. There was no word on the fate of the pilot or the cause of the crash.
Many of the warplanes in Iran's air force are aging U.S.-built jets such as the F-4 that Iran bought before its Islamic Revolution in 1979.
U.S. sanctions imposed on Iran after the revolution have made it hard for Tehran to buy spare parts for its military and civilian aircraft.
Iran's air force also has Russian-made Sukhoi warplanes and recently conducted test flights on two domestically-produced fighter jets.
Some information for this report was provided by AP and Reuters.