A charter bus caught fire Monday morning on Interstate 95 in Martin County, prompting authorities to close all southbound lanes and launch an investigation into the cause.

The fire occurred around 11:20 a.m. on the southbound side of the interstate. Martin County Fire Rescue responded to the scene to extinguish the blaze.

The driver was the only person on the bus at the time of the fire and was able to escape the vehicle. No injuries were reported in the incident.

One southbound lane of I-95 has since reopened to traffic. Authorities continue to investigate what caused the charter bus to catch fire.