Jakarta – New fighting in Indonesia's restive Aceh province has killed at least four people, police said Saturday.

Local police chief Maj. Muhammad Saimi said two guerrillas were killed in separate gun battles on Friday. Rebel leaders said the victims were police officers. Villagers said police also shot dead two civilians in northern Aceh, about 1,100 miles northwest of Jakarta.

The latest deaths bring to at least 23 the number of people killed in the region since rebel representatives and government officials agreed to extend a peace agreement 10 days ago.

Aceh is an oil- and gas-rich province on the northern tip of Sumatra, where separatist guerrillas have been fighting for independence since 1975. More than 6,000 people have been killed in the past decade.