The blast took place in a village just outside Mubi on Wednesday, according to an army colonel.
The leader of a vigilante fighter group in Nigeria says Boko Haram militants have killed about 45 people.
Islamic extremists in Nigeria have seized Chibok, forcing thousands of people to flee the town.
UN’s representative for central Africa has called on more international support in the struggle against Boko Haram.
Islamic extremists overran a major northeastern town that is home to Nigeria’s defense chief on Wednesday.
Escaping residents said Boko Haram insurgents abducted 80 girls and women from neighboring Adamawa state.
The fate of more than 200 missing schoolgirls abducted by the insurgents six months ago still is being negotiated.
The Islamists launched an attack on the town of Bama on Monday but came back in greater numbers overnight, the sources said.
Suicide Bombers attacked two mosques in northeast Nigeria’s Yobe state killing at least six people.
Our demand to demilitarise the Strip is not only for Israelis; it’s also for you, Fathi. We prefer happy neighbours to suffering neighbours.
Boko Haram militants take away Cameroon Vice Prime Minister Ahmadou Ali’s wife and house help.
Witnesses said the explosion ripped through the market early Tuesday.
Boko Haram appears to operate largely outside the banking system.
Boko Haram, whose name means ‘Western education is a sin’, has been carrying out deadly attacks in Nigeria.
It is the latest in a series of violent attacks blamed on Islamic extremists.