Firefighters were ambushed by a gunman while responding to a brush fire in Coeur d'Alene, Idaho, on Sunday, according to the local sheriff's office.

The suspect, who died on Sunday and was found with a firearm nearby, was a 20-year-old man, according to a law-enforcement official.

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.