Two fire trucks collided while responding to a fire in St. George on Thursday.

ST. GEORGE, Maine — Two fire trucks collided while responding to a structure fire on Thursday, sending two firefighters to the hospital with injuries, according to officials.

The fire trucks were shuttling water to a fire on Clark Island around 1:15 p.m. and collided as they passed each other, sending both vehicles off the road. A truck from Owls Head rolled over on its side. The other truck, which ended up in a ditch was from St. George.

The drivers of each truck, Keith Miller, 65, of St. Goerge and Donald Pierce, 64, were taken to a local hospital for minor injuries. The passenger in the Owls Head truck, Russell Hallock, 56, was flown to a trauma center for serious injuries, according to Knox County Sheriff’s Office Chief Deputy Patrick Polky.

Clark Island Road, where the collision occurred, is narrow and windy. Crews from St. George requested assistance from other towns to help transport water to the fire.

“It’s a long way down, and there’s no water source, so these guys have to shuttle water back and forth,” Polky said.

Around 2:30 p.m., fire trucks from nearly every town in Knox County were still transporting water to the fire, which has destroyed a garage. No injuries from the fire were reported, according to police and fire officials on the scene.

Polky said the fire was contained.

The state fire marshal’s office is expected to investigate the fire, and the crash will be reconstructed.

Owls Head Fire Chief Frank Ross said Thursday’s crash leaves his department down a second fire truck after a transmission failure put another out of commission. The department has two other operable trucks.