Fairmount City, IL (KSDK) - A fire that ignited inside the trailer of an 18-wheeler forced the closure of the northbound ramp of I-55/70 at Illinois Route 203 overnight.

The unidentified driver of the rig notice something wrong and stopped the big rig to investigate. After discovering the trailer was on fire, the driver detached the tractor from the trailer to separate the two.

By the time firefighters arrived, the trailer was engulfed and destroyed.

No injuries reported and the exact cause of the fire remains under investigation.