The governor of the affected state said it was the work of suicide bombers.
Two explosions have occurred simultaneously at an Army Barracks and a company involved in uranium exploration in Agadez State of Niger Republic.
The governor of Agadez state, Colonel Garba Maccido, confirmed the incident, which he described as the work of suicide bombers to the Hausa service of the BBC.
Initial reports said only the suicide bomber lost his life at the attack on the Army Barracks, while, two others sustained injuries.
No casualty was recorded at the uranium exploration company, named ‘Somai’.
It is not clear if the attack has any links to the Boko Haram insurgency in Nigeria. Niger and Nigeria share large borders around the troubled Borno and Yobe States currently under emergency rule.
There had been reports that some Boko Haram members were fleeing to Niger to escape from the onslaught by the Nigerian military.
The Agadez governor promised to provide more details later.