A suicide bomber killed at least 50 people at a mosque in the northeast Nigerian town of Mubi on Tuesday, Reuters reported, citing local officials and police. Dozens of people were injured, according to Ahmed Musa, chairman of Mubi council. Mubi is a town in Adamawa, a state in which Boko Haram militants held territory in 2014. The insurgents were pushed out of those areas by troops in early 2015.