BAUCHI, Nigeria – Gunmen attacked a camp for a construction company in rural northern Nigeria, killing a guard and kidnapping seven foreign workers from Britain, Greece, Italy, Lebanon and the Philippines, authorities said Sunday, in the biggest kidnapping yet in a region under attack by Islamic extremists.

The attack Saturday night happened in Jama’are, a town in Bauchi state. There, the gunmen first attacked a local prison, burning two police trucks, Bauchi state police spokesman Hassan Muhammed told The Associated Press.

The gunmen then targeted a workers’ camp for Lebanese construction company Setraco, which is building a road in the area, Muhammed said.