The explosion occurred at Redeemed Christian Church of God along Bauchi road in Potiskum Town, Yobe State.
One eye witness told reporters that the bomb went off at a time worshipers were observing the Sunday service.
The resident said “six persons died” from the blast.
Yobe State police have confirmed the explosion and the number of casualties reported.
He revealed that all the injured are currently getting rehabilitated at various health facilities in the area.
Potiskum last suffered a twin suicide attack on June 15, in which 10 people were killed and several others injured.