Nigerian soldiers hold up a Boko Haram flag that they had seized in the recently retaken town of Damasak, Nigeria, on March 18, 2015. Emmanuel Braun/Reuters

Armed men killed 137 people in coordinated raids on villages in southwestern Niger on Sunday, the government said, revising the toll up from a previous estimate by local authorities of around 60.

Reporting by Moussa Aksar; Writing by Alessandra Prentice; Editing by Chris Reese