Fire crews battled a large fire Sunday in downtown Rouleau, Sask. — the town where the popular television sitcom Corner Gas was filmed.

Throughout the evening, crews poured water on a single-storey commercial building on 105 Main St., an area where the show was shot for six seasons. The building that burned had been used as one of the sets.

"It was quite an inferno, all right," Mayor Grant Clark said the next morning. "It's a pretty sad morning for a lot of people here."

Crews were on the scene at 7 a.m. CST combing through the rubble. The walls of the stucco building remained standing, but the roof was destroyed.

Police said the cause of the fire isn't yet known.

The building was home to Spalding Orthopedics, a prosthetic limb design company.

While the TV show was in production, it served as the fictional "Foo Mart".

Clark said the owner of the business was part of the volunteer fire crew that fought the blaze.

"He doesn't know what he's going to do," Clark said. The cause of the fire isn't known.

A Corner Gas movie was filmed in Rouleau this summer. In the TV show and movie, the town is called Dog River.

Corner Gas has been an important tourist draw for the town of 453 people in recent years.

Crews combing through rubble on Monday

Fire crews combed through the rubble of the fire on Main Street on Monday. (Adrian Cheung)