At least 10 fighters from the Liberation Tigers of Tamil Eelam (LTTE) have been killed in battles with Sri Lankan government forces, according to the country's defence ministry.
Sporadic fighting took place around the northern Vavuniya district on Monday, the ministry said, without giving casualty figures for its own troops.
The defence ministry also blamed the LTTE for killing a policeman during fighting in the eastern district of Batticaloa on Monday.
There was no immediate comment on the defence ministry's statement from the LTTE, who are fighting the Colombo-based government to win autonomy for ethnic Tamils.
The latest clashes raise the number of LTTE fighters killed by Sri Lankan troops to 3,614, according to the country's defence ministry.
The ministry says that 272 security force personnel have died in the fighting.
The defence ministry's death toll cannot be independently verified as the government prevents media and human rights workers from entering areas where combat is taking place.