A Sri Lankan government attack on the shrinking territory of the country's separatist Tamil Tiger rebels has killed a senior leader of the insurgents, the military said. The death of Sabaratnam Selvathurai on Wednesday would be a boost for the government as it battles for the last rebel stronghold in the north and appears poised to defeat the group after more than 25 years of civil war. The report of his death came a day after a suicide bomber killed 14 people and critically wounded a government minister in the south. The military has blamed the assault on the rebels. Military spokesman Brig. Udaya Nanayakkara said that troops on the front lines confirmed killing Selvathurai, whose nom de guerre was Thamilenthi, in battles in the last rebel-held town of Puthukkudiyiruppu.