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 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.

Two helicopters converged on the area, armed with snipers ready to take out the suspect if needed, while the FBI used his cellphone data to track him and