Militants killed four people in an attack on a village in north-eastern Nigeria, the center of Boko Haram’s insurgency.

The attack took place on Friday night in Mairi, about 11 kilometers from Maiduguri, the capital of Borno state, Baba Kaka Garbai, a senator for the region, told reporters on Saturday.

“This village was burnt,” Garbai said. “The attack is a clear testimony that the military will have to do more. And the attack coming very close to Maiduguri is an indication that the insurgents are getting closer to the town.”

Boko Haram has been waging an insurgency since 2009 to impose its strict version of Islamic law on Africa’s biggest economy and oil producer.

Militants massacred 65 people in the village of Dalori, also close to Maiduguri, on Jan. 30, firing guns, exploding bombs and setting houses on fire. Nigerian forces killed more than a dozen people believed to have helped carry out the attack on Friday morning.

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