Alou Diallo says he was drinking tea with his family one morning last month when groups of “white soldiers” invaded his village in central Mali, setting fire to houses and gunning down people suspected of being Islamic extremists. He scrambled to safety in the bush, but his son was shot and wounded while fleeing, then was finished off as he lay on the ground.

“I watched my 16-year-old son die,” Diallo told The Associated Press in Mali’s capital, Bamako, where he lives in a makeshift camp for displaced people. As he recounted that awful Saturday in his village of Bamguel, the 47-year-old former cattle breeder made no attempt to hide the anger toward the troops, which he believed to be Russian mercenaries, who turned his world upside down.

“I really want peace to return and things to go back to normal,” he said. “Here in Bamako, I live a life I didn’t choose.”

It’s been more than a year since hundreds of fighters from the Wagner Group, a shadowy Russian military contractor, began working alongside Mali’s armed forces to try to stem a decade-long insurgency by Islamic extremists in the West African country, Western officials say.

But since the mercenaries arrived, diplomats, analysts and human rights groups say indiscriminate violence against civilians has grown, the extremists linked to al-Qaida and the Islamic State group have only gotten stronger, and there’s concern the Russian presence will further destabilize the already-troubled region.