At least 56 people were killed in clashes between security forces and Islamist militant group Boko Haram in Nigeria's Borno state, a media report said Monday.
According to officials, the terrorists attacked military bases while the troops were out on patrol, Xinhua reported.
The victims included five soldiers and a senior military official.
The troops on patrol around Baga area of the state recovered explosives and rifles concealed in a truck loaded with fish and other commodities, the official said.
Four suspects have been taken into custody in connection with the incident.