A maritime official says armed pirates have hijacked a Greek bulk carrier with 25 crew members off the eastern coast of Somalia. Noel Choong of the International Maritime Bureau said the ship was en route to Kenya when it was attacked early Thursday off the coast of Mogadishu, the 13th ship seized in the African waters in the past two months. He says a multinational naval force patrolling the area has been informed, and that ships have been warned to stay clear of Somalia's coast, according to a report of the Associated Press.