(AP) — Police in northeast Nigeria say suspected Islamic extremists attacked a police station, killing four officers in a gun battle. The attack early...

(AP) — Police in northeast Nigeria say suspected Islamic extremists attacked a police station, killing four officers in a gun battle.

The attack early Thursday morning in Babangida, a small town in Yobe state, is part of a continuing wave violence sweeping the north.

Yobe state police commissioner Rufai Sunusi said Thursday that his officers killed five of the gunmen. Sunusi said two officers also were wounded in the attack.

After the attack, Yobe state’s government announced a dusk-to-dawn curfew for citizens.

Boko Haram and other Islamic extremists have been waging a guerrilla campaign of shootings and bombings across northern Nigeria. The violence has killed at least 173 people this year alone, according to an Associated Press count.

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