Deadly attack at Nigerian college

At  least six people have been killed in a gun and bomb attack at a university in Nigeria's northern city of Kano, witnesses and police said.

A bomb squad and military units are searching for the gunmen who mounted the attack at Bayero University.

Reports suggest the violence may have targeted Christian students who were holding a religious service in one of the lecture theatres.

An army spokesman said several wounded people had been taken to hospital.

"The attack took place in one of the lecture theatres used as a place of worship by Christians," said Lt Iweha Ikedichi.

"There were casualties, but I don't have exact figures. Some have been rushed to local hospitals."

He said soldiers and police had surrounded the university and were searching for the gunmen.