They said that rebels opened fire at a checkpoint in the Vavuniya district when the police tried to search them.

In Serunuwara in Trincolmalee, a homeguard and ex-homeguard were shot and killed by suspected Tamil Tigers.

Police said the bodies were found in the nearby jungle where they had gone on hunting.

The gun which the homeguard carried was taken away by the assailants.

Police said they found a dead wild boar where they found the two dead bodies.

People living in the area have been warned not to go to the jungle, police further said.

When asked about an attack in Adampan in Mannar, Army spokesman, Athula Jayawardena said although he had come to know about an attack in the area, he had no information as it had happened in the LTTE controlled area.

More than a hundred people have been killed over the past month -- the bloodiest period since a ceasefire was signed four years ago.

The Norwegian peace envoy, Erik Solheim, who played a key role in the 2002 ceasefire, is expected to visit Sri Lanka on Monday to try to restart the faltering peace process.