The Commander of the Joint Military Task Force in Lokoja, Lt-Col. Gabriel Olorunyomi, confirmed the incident.
He said 15 worshippers died instantly in the attack while another died on the way to the hospital.
The commander said that many injured persons were rushed to hospitals in Lokoja, a distance of 40 minutes driving on the road from Okene.
He said the casualty figure might rise considering that some sustained heavy injuries.
No group has claimed responsibility for the attack as yet. (NAN)