Militants have killed at least 40 farmers in Nigeria's northeastern Borno state in the latest violence to hit the conflict-wrought region, a government official said Monday. Fighters from the Islamic State-aligned Islamic State West Africa Province (ISWAP) late Sunday rounded up scores of farmers in Dumba on the shores of Lake Chad and shot them dead,

He called on the military to "track and deal decisively" with the perpetrators.At least 40 farmers were killed over the weekend in an attack by suspected Islamist militants, the governor of Nigeria's northeastern Borno state said on Monday.