A truckload of muffins may have damaged an overpass on Montreal's South Shore.

The fire began around 3 a.m. Monday when a truck hit a guardrail near the intersection of Highway 30 and route 930.

The driver came to a stop, unharmed, and the truck was somehow detached from the trailer.

Firefighters rushed to the scene and put out the flames, but the heat may have damaged some of the concrete or steel supporting the Route 930 overpass.

Engineers from Transport Quebec will have to inspect the structure to ensure its safety.

A spokesperson for A30, the private company that handles maintenance of Highway 30, said the company is in the process of re-opening the affected stretch of highway after determining it's safe to drive on. They added that additional inspections will be conducted on Tuesday.