Norwegian peace brokers have held talks in London with the chief Tamil Tiger peace negotiator in an effort to save Sri Lanka's fragile peace process.

Diplomatic sources say Norway's Foreign Minister Jan Petersen and his deputy Vidar Helgesen met Wednesday for about an hour with the London-based rebel negotiator, Anton Balasingham.

Details of the meeting are not available. The talks were the first since unknown snipers assassinated Sri Lanka's Foreign Minister Lakshman Kadirgamar late Friday at his home in Colombo.

Sri Lanka's government has blamed the rebels for the killing, but the Tigers have denied any involvement.

The assassination has intensified fears that the almost three-year-old cease-fire between the Sri Lanka government and the rebels might collapse.

Some information for this report provided by AP, AFP and Reuters.