KADUNA/KANO, Nigeria - Suspected Islamist gunmen have launched a series of gun and bomb attacks in a remote town along Nigeria's border with Cameroon, killing at least 25 people, police said on Saturday.

The gunmen carried out four simultaneous assaults on Ganye in Adamawa state on Friday, opening fire on a bar, a bank, a prisoner warder and separately attacking a prison, Mohammed Ibrahim, police spokesman for the western Adamawa state said.

"Twenty five people were killed in total in four different simultaneous attacks by gunmen in Ganye," Ibrahim said.

Members of insurgent group Boko Haram were the prime suspects, he said. Violence by Islamist insurgents in northern Nigeria is on the rise again after a brief lull.

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