An explosion has rocked a crowded market in Nigeria, killing and injuring many, residents said.
A member of the civilian joint task force in Biu in north-east Nigeria said that the explosion is the first bombing in the area.
He could not confirm if it was a suicide attack or a planted bomb.
A high number of dead and injured are being evacuated, he said.
Nigerian militant group Boko Haram is suspected of carrying out the bombing.
The civilian joint task force is a group formed by residents to combat Boko Haram.
He said that the number of dead and injured is "very high", adding: "For now we are trying to get volunteers to donate blood to seriously injured victims who have lost a lot of blood. The hospital has run out of blood in its reserve, we are told."
Boko Haram has fought a five-year insurgency against the Nigerian government, launching scores of attacks that left 10,000 people dead last year alone.
In recent weeks, the terror group has intensified its assaults on neighbouring Cameroon and Niger.