The death toll from southern Asia's tsunami rose to around 170,000 Monday as Sri Lanka added more than 7,000 victims to its tally.

The December 26 tsunami and underwater earthquake left 38,000 people dead on the island nation - the second highest casualty rate after Indonesia, where nearly 115,000 are confirmed dead.

Meanwhile, Indonesian and United Nations officials say they have no information regarding a possible terrorist attack on foreign aid workers in Indonesia's devastated Aceh province.

Denmark's Foreign Ministry Monday said "imminent" terrorist attacks were planned on relief workers in the region, but gave no details.

Muslim separatists in Indonesia's Aceh region have been fighting for independence for more than three decades. They agreed to a temporary ceasefire shortly after the tsunami disaster.