Eleven people, including seven separatist rebels, have been killed in Indonesia's violence-torn Aceh province, the military and civilians said.

Some 20 soldiers raided a base of the Free Aceh Movement in the Gunung Rotan hills of South Aceh district on Wednesday and killed seven rebels, said district military chief Lieutenant Colonel Agus Permana. The rebels could not immediately be reached for confirmation.

Rebels ambushed a military convoy in the Krueng Sabee district of West Aceh and shot dead a soldier on Thursday, said military spokesman Lieutenant Colonel Firdaus.

In the provincial capital Banda Aceh on Thursday three civilians and a policeman were wounded after two unidentified men riding a motorcycle threw a grenade into a police car, said district police chief Sayed Hoesaini.

Troops shot dead two teenagers riding a motorcycle in front of a military base in the town of Bireuen on Thursday, a witness told reporters.

A 15-year-old boy was shot dead for running away after he became scared by a military search for rebels in the Delima area of Pidie district on Thursday, residents said.

The Free Aceh Movement has since 1976 waged a guerrilla war for an independent state in Aceh, an oil- and gas-rich province on the north of Sumatra island. More than 1,600 people have died this year alone.