COEUR D’ALENE, Idaho >> A man who started a wildfire and then fatally shot two firefighters and wounded another in northern Idaho was a 20-year-old transient who attacked the first responders after they asked him to move his vehicle, a sheriff said Monday.

Kootenai County Sheriff Bob Norris offered new details about the Sunday confrontation at Canfield Mountain, just north of Coeur d’Alene, a popular recreation area. He said Wess Roley was living out of his vehicle, had once aspired to be a firefighter and had only a handful of minor contacts with area police.

“We have not been able to find a manifesto,” the sheriff said, adding a motive was still unknown.

Norris said families of the victims are “in shock — absolutely.”

Roley had set a fire using flint, and the firefighters who rushed to the scene instead found themselves under fire. They took cover behind fire trucks, but two died and a third was wounded during a barrage of gunfire.

“There was an interaction with the firefighters,” Norris said. “It has something to do with his vehicle being parked where it was.”

Roley later killed himself, the sheriff said.

Two helicopters converged on the area Sunday, armed with snipers ready to take out the suspect if needed, while the FBI used his cellphone data to track him and the sheriff ordered residents to shelter in place. They eventually found Roley dead in the mountain.