Crews are treating a fire at Laidig Concrete in the 50000 block of Executive Drive in St. Joseph County as suspicious.

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We're told a car that was not supposed to be there was sitting next to the building, on fire. It spread to the structure.

The fire started around 4:30 a.m. Flames were shooting out of the roof, but it took firefighters just a few minutes to put it out.

There were no injuries.

An investigator with the state fire marshal’s office was on scene this morning investigating. He told us the car is so badly damaged that they can’t tell who it belongs to. The vehicle identification number is unreadable.

We have a crew on scene. Stay with us for updates.