Islamist militant group Boko Haram, attacked a military base in eastern Niger, expanding its reign of terror across the region, witnesses said on Friday.
It is the first time the Nigeria-based insurgents launched an assault in Niger, after infiltrating northern Cameroon for the past few months, killing dozens of people.
Boko Haram clashed with soldiers in Bosso, a town that borders Nigeria.
However, a causality figure could not be confirmed.
The attack came a day after Boko Haram killed 31 people in northern Cameroon, when it burnt three mosques in the town of Fotokol, also near the Nigerian border.