JAFFREY — No one was injured when the cab of a tractor trailer caught fire at a gas station in town early Tuesday morning, according to fire officials.

Jaffrey firefighters responded to Red’s gas station on River Street at about 3:45 a.m. for a report of a tractor trailer fire, according to Jaffrey Fire Chief David Chamberlain. The fire was dispatched as a first alarm because of its proximity to an empty fuel tanker and the gas station’s fuel pumps, Chamberlain said.

The cab was parked at the station because it had been worked on the day before for some mechanical issues, according to Chamberlain. The fire was knocked down within about 20 minutes, Chamberlain said, and firefighters stayed on the scene for about an hour.

The cause of the fire is undetermined, Chamberlain said. He added the fire is not considered suspicious and was likely started by some kind of mechanical problem. The vehicle was a total loss, while the fuel tanker sustained minor damage, according to Chamberlain.

About 30 firefighters responded to the scene, including firefighters from Rindge, Peterborough, Keene and Dublin, Chamberlain said. The New Ipswich Fire Department covered the Jaffrey station.