Both the Marxist JVP and Buddhist monk party the JHU have long opposed making any concessions to the Liberation Tigers of Tamil Eelam (LTTE), who ministers met last month in Switzerland for talks aimed at stopping a return to a two-decade civil war.

"We do not believe that the LTTE Tigers will ever change their stripes," said the JVP in a statement after an all-party meeting to discuss the peace process.

"We urge the government not to be lulled into a false sense of security and become complacent."

A government official said the meeting, called to brief politicians on last month's talks in Geneva, had been cordial and the coalition remained intact.