The Sri Lankan military claimed it destroyed a Tamil Tiger suicide boat Saturday, hours after the government ruled out a cease-fire in the northern war zone where hundreds of thousands of civilians are reportedly trapped. The explosives-laden boat was intercepted by a naval ship and destroyed with heavy gunfire in the early hours of Saturday, said a statement on the Ministry of Defense Web site. It said the boat was apparently launched from Mullaittivu and was headed for a naval blockade along the northeastern coast. It gave no other details, and the Tamil Tiger rebels did not immediately respond to the claim, according to a report of Associated Press.