"We need to maintain emergency laws to ensure the safety and security of the nation," the premier told parliament.
Sri Lanka has resisted international calls to end the state of emergency, saying that Tiger remnants were trying to regroup and resume their armed campaign for an independent homeland for the island's ethnic Tamil minority.
Jayaratne said the government continued to receive information about Tigers trying to collect weapons and regroup.
The United Nations estimate that up to 100,000 people died in the Tigers' independence bid from 1972 till May last year.
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The Tigers have launched no attacks since being defeated, but the government maintains tough anti-terror laws which are extended every month by parliament.
The opposition accuses