Sri Lankan soldiers and Tamil rebels clashed in northern Sri Lanka, killing ten combatants, the military said Monday. The fighting occurred in northern Vavuniya area, on the frontier between government-controlled areas and rebel-held parts of the north Sunday evening, military spokesman Brig. Prasad Samarasinghe said. He said seven insurgents and one soldier died. In a separate clash Sunday, soldiers killed two rebels in the same region, Samarasinghe said. The death tolls could not be independently confirmed, and rebels' military spokesman Rasiah Ilanthirayan did not answer a telephone call from The Associated Press seeking comment.