ZAMBOANGA CITY: Unidentified gunmen attacked a fishing trawler off Tawi-Tawi and killed its skipper, reports said on Monday. The weekend attack occurred off Mapun Island after a group of armed men on a speedboat hijacked the trawler. A fisherman jumped off the boat for fear of being killed and is still missing while nine other crewmen were unharmed by the gunmen, who fled after the shooting. The identities of the slain skipper and the missing crew man were not immediately known, but the trawler came from Palawan and was on a fishing expedition in Tawi-Tawi. It was unknown if the attackers were locals protecting their rich fishing ground in the area. There was no statement from local authorities on the attack.