Two soldiers, a policeman and five civilians were shot dead in Indonesia's Aceh province over the weekend despite this month's peace agreement, an army officer and a rebel leader said.

The soldiers were the first known to have been killed in the province since the government and separatist rebels signed the peace pact in Geneva on December 9.

Rebels from the Free Aceh Movement (GAM) on Sunday ambushed a truckload of troops who were bringing help to flood victims in South Aceh province, killing two soldiers and injuring four, said South Aceh military chief Lieutenant Colonel Agus Permana.

Local GAM commander Abrar Muda said the soldiers were killed after they cornered guerrillas at Kampung Malaka in South Aceh and were not ambushed.

Muda said the members of the Kopassus special forces had raided several houses in Kampung Malaka and conducted major anti-rebel operations there despite the truce.

"After the shootings, the army conducted further sweeps in the area and shot dead five local civilians," Muda said. He also said troops have arrested the wives of 20 local rebels. Permana could not immediately confirm reports of the civilian casualties and the arrests.

A group of some 10 gunmen believed to be GAM guerrillas shot dead a policeman and critically wounded another late on Sunday at Labuhan Kedek in East Aceh, said Aceh police spokesman Commissioner Taufik Sutiyono. He said the policemen were returning from guarding a local timber company. There was no immediate comment from local rebel leaders.

Despite the killing, Sutiyono and Permana said soldiers and police have been urged to continue to abide by the truce, which is being monitored by representatives from the two sides as well as members of the Thai and Philippine military..

The conflict in Aceh has claimed an estimated 10,000 deaths since it began in 1976 in the province on the northern tip of Sumatra island.