The authorities of the Kontangora Federal College of Education have shut the school and asked students to go home.

A Student Mary Okafor told a news agency that the authorities have shut their school and all other schools in the town.

“We have all been asked to vacate the hostels’, she said.

Mary said the blast happened as they were sitting the end of semester exams and saw everyone rush out of class.

“We saw bodies on the ground between the library and the female hostel. Among the bodies were two dismembered women who we believe were the bombers,” she added.

“At least 10 students were killed and several others injured,” said Okafor.

“They have all been moved to the general hospital. We have all been asked to vacate the school. The authorities in the town have asked all schools to close.”

There was no official confirmation of the death toll.

Educational establishments in northern Nigeria have been hit several times by bombings in recent months.

On September 18, at least 13 were killed in Kano during a shoot-out between police and suspected suicide bombers, again at a teacher training college.

A female suicide bomber killed six on July 30 when she detonated her explosives at a noticeboard on the campus of the Kano Polytechnic College while students were crowded around it.

The attack was the fourth by a female bomber in the city in a week and prompted the authorities to cancel public celebrations marking the end of the Muslim holy month of Ramadan.

The bombings were linked to Boko Haram, which is opposed to so-called “Western education” and wants to create a hardline Islamic state in Nigeria’s Muslim-majority north.