Unidentified assailants killed 19 people and wounded 13 in an attack on and around the town of Arbinda in northern Burkina Faso on Sunday, the government said.

Hundreds of people have died in Islamist violence over the past months and more than 150,000 have been forced to flee as jihadist groups spreads across the arid Sahel region.

Once a pocket of calm in the Sahel, Burkina has suffered a spillover of Islamist violence from neighboring Mali, where an attack on a village on Sunday left at least 95 dead and more than a dozen missing.

Deteriorating security prompted the government to declare a state of emergency in several northern provinces bordering Mali in December, which was extended by six months after jihadists attacked civilians in Arbinda’s Soum province.

Burkina’s armed forces have launched a search operation across the area targeted by Sunday’s attack, the government said late on Monday.