Day of violence in northern Nigeria kills at least 24

KANO, Nigeria (Reuters) - Clashes between a violent Islamist sect and security forces in Nigeria's northeastern city of Damaturu have killed at least 24 people in the past day, police said on Friday.

A sustained gun battle broke out between Nigerian security forces and suspected Islamist militants in Damaturu on Thursday, and several explosions were heard.

Then on Friday suspected sect members opened fire on a group of policemen shortly after Friday prayers in the city, killing four, local police officials said.

Police commissioner Lawan Tanko of Yobe state, of which Damaturu is the capital, told Reuters a dusk to dawn curfew had been imposed on the city.

"The situation is now calm. We lost seven security men and twelve members of the Boko Haram sect were killed in the shoot out last night," he said.

"Though you cannot predict members of the sect, our men and the military are combat ready. Only one civilian was killed (in the violence on Thursday)."

Confrontations between security forces and the Boko Haram sect have become increasingly frequent in the past couple of weeks, as the north's simmering conflict escalates, though the insurgency remains low level and sporadic.

Nigerian police arrested 14 suspected members of Boko Haram and seized explosives after a gun battle left four militants and three policemen dead in the city of Kano last weekend.

Lawan said the fighting in Damaturu broke out after his men raided a suspected Boko Haram hideout.