A bomber blew himself up inside Al-Amir restaurant, a popular chain in northern Nigeria, at about 4:40 pm (1540 GMT), killing the manager and a steward. Thirteen staff and customers were seriously injured.
"We evacuated three dead bodies which included the bomber and two victims to the hospital," said a police officer involved in the rescue operation. Another rescue worker and a nurse at the Potiskum General Hospital confirmed the toll.