COEUR D’ALENE, Idaho — A 20-year-old man’s life appeared to have begun to unravel in the months before authorities say he fatally shot two firefighters and severely wounded a third as they responded to a wildfire near Coeur d’Alene, Idaho.

Two firefighters were shot dead and a third wounded on an Idaho mountain when they were ambushed by a man who set the fire to lure them to the area, the local sheriff says.

The two slain firefighters, who have not been identified, died on the way to the Kootenai Health campus in Coeur d’Alene, a hospital spokesperson said. One was from the Coeur D’Alene Fire Department, and the other was from Kootenai County Fire and Rescue, authorities said.