The devices stored in a police station went off when an officer tried moving them, said Ahmed Sajo, Adamawa state information commissioner in Yola, where the explosion happened.
“Many police (officers) are feared dead,” he said. The National Emergency Management Agency (NEMA) put the death toll at four.
Officials said some of the explosives had been confiscated from Boko Haram, a jihadist group which has been waging a seven-year insurgency in northern Nigeria, which has killed thousands and displaced more than two million.