Eight people died and 36 were arrested in clashes between the Myanmar army and what the government believes are Rohingya Muslim militants in northern Rakhine State, state media said on Sunday, in the largest escalation of the month-old conflict yet.

Skirmishes took place throughout Saturday in villages in the north of Rakhine, leaving one officer and one soldier dead. Six bodies of attackers were recovered in the aftermath, while 36 other people believed to be involved were arrested.

About 60 attackers armed with guns, knives and spears ambushed government troops on Saturday morning, the state-owned Global New Light of Myanmar said. The army returned fire, but at one point asked for army choppers to reinforce because its troops were outnumbered, the paper said.

Soldiers have poured into northern Rakhine, close to the border with Bangladesh, since Oct. 9, after an insurgent group of Rohingyas that the government believes has links to Islamists overseas launched coordinated attacks on several border posts.