Banda Aceh – At least 11 more people have been killed in clashes between Indonesian troops and police and separatist rebels in Aceh province, police and residents said Monday.

In another incident two men on a motorcycle threw a hand grenade at a bank in the provincial capital Banda Aceh early Monday. There was minimal damage and no casualties, said Aceh police spokesman Commissioner Sudarsono. Several members of the police paramilitary unit Brimob who were guarding the bank fired in the air and sparked a brief panic at the nearby market, witnesses said. It was the fourth blast to rock the city in the past week.

In South Aceh seven bodies with gunshot wounds were found at four separate locations on Sunday, humanitarian workers said. Police and the separatist Free Aceh Movement (GAM) blamed each other for the killings.

South Aceh GAM spokesman Ayah Manggeng said Brimob members killed the seven after arresting them in sweep operations on Saturday. Sudarsono said there were indications that rebels killed the civilians.

Aceh Besar GAM spokesman Ayah Sofyan said Brimob officers conducting a sweep in the Kuta Baro district near Banda Aceh shot dead a teenage civilian there on Sunday. Sudarsono said police had been ambushed and the victim was one of four rebels spotted during an exchange of fire. Sudarsono said a civilian was found dead with a gunshot wound in Pidie district on Sunday.

Residents in the Baktiya district of North Aceh said troops killed seven people – not five, as the military reported Sunday – in an attack early Sunday on a suspected rebel base. The North Aceh deputy GAM commander, Sofyan Daud, said four of those killed were guerrillas and the other three were civilians.

In an unconfirmed report, Daud said his men killed four soldiers in an attack on a security outpost at Samakurok in the same district on Sunday which also claimed the life of one guerrilla. Military spokesman Lieutenant Colonel Firdaus said he had no report of the incident.

Rebels have been fighting since 1976 for an independent Islamic state in the resource-rich province on Sumatra island. More than 1,200 people have been killed this year alone, most of them since the military began a crackdown in April.