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WASHINGTON (AP) _ A Navy pilot was missing and presumed dead after his F/A-18 hornet crashed in the Adriatic Sea during a routine training mission Sunday, officials said.

The pilot was Lt. Cmdr. Robert Edward Clukey, 33, of Orono, Maine. Navy officials called off the search for him Monday, more than 24 hours after his fighter jet crashed into the sea.

Clukey was flying off the aircraft carrier USS George Washington when he crashed about 85 miles north of Bari, Italy, in international waters, officials said. There was no word Monday on a possible cause for the crash; the Navy was investigating.

Planes and helicopters from the George Washington, as well as the USS Normandy and a helicopter based on it, joined in the search for Clukey and his plane.