A school bus fire on Highway 401 near Woodstock late Tuesday afternoon, closed eastbound lanes and snarled traffic.

The bus, stopped about 200 metres west of Sweaburg Road, was engulfed in flames around 5 p.m., but firefighters were able to quickly extinguish the blaze.

OPP say there were no children on board and the driver is fine.

Police say there is nothing suspicious about the fire.There's no word yet on the cause.