The force says pirates attacked the Marshall Islands-flagged MT Motivator on Sunday in the northern Strait of Bab al Mandeb. The seizure was only confirmed early Monday after communication with ship was lost, the force says in a statement.
The EU Naval Force says the 13,065 ton-ship has a crew of 18 Filipinos on board.
The Horn of Africa nation's 19 years of lawlessness have allowed piracy to flourish. The waters surrounding Somalia, including the Gulf of Aden that connects the Red Sea and the Indian Ocean, are known to be among the world's most dangerous.