UPPER UWCHLAN, Pa. (CBS) – A school bus that was carrying middle school children on their first day of school in Chester County Monday afternoon suddenly became engulfed in flames, authorities said.

The fire happened at about 3:20 p.m. on Fellowship Road near Magnolia Drive in Upper Uwchlan. Police say the bus driver, who was carrying students from Lionville Middle School, reported smelling smoke and called for a relief bus from the Wolfington Bus Company.

Authorities say just moments after the students were safely evacuated and left the area in the new bus, flames erupted on the abandoned school bus.

Fire crews responded and were quickly able to extinguish the fire. A mechanical problem reportedly caused the blaze.

Fortunately, no injuries were reported.

bus fire 2 Fire Erupts On School Bus In Chester County

(Credit: JB Belbin)

Top Content On CBSPhilly

Watch & Listen LIVE