An arsonist set three cars on fire Monday morning at a used car lot in St. Hubert.

Neighbours called 9-1-1 around 3:40 a.m. after spotting the flames.

Firefighters rushed to Rennen Automobiles on Grande Allée Blvd. and put out the fires, but the damage to the three vehicles was extensive.

Police are not certain of the cause but believe someone deliberately set the BMW and two Mercedes on fire.