In Agadez, a regional capital to the southeast of Arlit, a truck carrying armed assailants and explosives detonated in front of the army barracks, Labo said.

CNN: Report: Islamist militants claim 2 deadly attacks in Niger

Both attacks -- at the army barracks in Agadez in central Niger and a Somair uranium mine in Arlit in northern Niger -- happened about 5 a.m.

CNN: Report: Islamist militants claim 2 deadly attacks in Niger