A U.S. Navy ship mistakenly shot down an American fighter jet over the Red Sea early Sunday, the U.S. military said, highlighting the potential risks for international forces as they try to stop attacks on cargo ships by the Houthi militia in Yemen.

Two service members ejected above the Red Sea after a warship fired on their aircraft, according to U.S. Central Command. Both sustained minor injuries.

The U.S. military says two U.S. Navy pilots have been shot down over the Red Sea in an apparent “friendly fire” incident.