Authorities are investigating a fire that broke out inside a bus at the LaBrae Schools Bus Garage early Monday.

Firefighters from the nearby Warren Township Fire Department were first to arrive at the garage on West Market Street shortly before 8 a.m. Monday.

After reporting that flames had spread through the bus, another fire department was called out to help fight the blaze.

A mechanic told investigators that he was warming up the bus outside the garage when fire broke out in the front of the bus.

A hazmat crew came out to keep leaking fuel from flowing into a nearby wooded area.

No one was injured.