Gunmen ambushed and killed five Malaysian policemen as fears mounted that armed intruders from the southern Philippines had slipped into at least three coastal districts on Borneo island, officials said Sunday. Two of the attackers were also fatally shot Saturday night, escalating tensions in eastern Sabah state. Security forces clashed with the clan members in the coastal area of Lahad Datu on Friday, leaving 12 Filipinos and two Malaysian police commandos dead, according to a report of the Associated Press.