The victims had their throats slit and then were thrown under a bridge.
Advertisement - story continues below
Sky News reported:
Up to 100 bodies, many with their throats slit, have been found in a mass grave on the edge of a town in northeast Nigeria after it was freed from Boko Haram militants.
Soldiers from Chad and Niger who have liberated Damasak from the Islamist group said they discovered the bodies under a bridge on one of the main roads leading out of the town.
Chad’s military spokesman Colonel Azem Bermandoa Agouna said: “There are about 100 bodies spread around under the bridge just outside the town… this is the work of Boko Haram.”
A Reuters witness said they had counted at least 70 bodies.