article_snippet: (CNN)Troops from Niger and Chad discovered a mass grave with more than 90 decomposed bodies near a northern Nigerian town recently retaken from the Islamic militant group Boko Haram, security sources from both countries said Friday.
article_snippet: The corpses, some of both countries beheaded, were found in a shallow mass grave under a bridge just outside the Nigerian town of Damasak, near the border with Niger, security sources from both countries said.
highlights_snippet: The shallow mass grave is under a bridge near the town of Damasak .
  
highlights_snippet: More than 90 decomposed bodies .
  