Jakarta – Six suspected separatist rebels were killed in Indonesia's Aceh province Thursday, as Amnesty International said the continuing military campaign there had caused "a marked deterioration" in the province's human rights situation.

The six were shot in separate incidents across the province, said army spokesman Lt. Col. Asep Sapari. No soldiers were injured in the fighting. The rebels' Free Aceh Movement couldn't be reached for comment.

It's impossible to independently verify military claims about Aceh – journalists are barred from parts of the province on Sumatra island's northern tip. Last May, Indonesia's government abandoned an internationally sponsored peace process with the rebels, and the military launched a massive offensive in an effort to crush the 27-year-old rebellion.

More than 50,000 troops and paramilitary police have been deployed to confront Aceh's estimated 5,000 insurgents and sympathizers. At least 2,000 people have died in the fighting there in the past year. Rights groups have said most of them were innocent villagers caught up in the fighting.

In a statement received Wednesday, Amnesty International said that the conflict has displaced tens of thousands of people, and that both government troops and rebels are guilty of rights abuses.

The rights group's statement also expressed concern for the fate of the 2,000 people captured by security forces. "Detainees were denied access to lawyers," the statement said. "There were concerns that they were at risk of torture or ill-treatment, apparently routine in military and police custody."