Police say two suspects were captured on surveillance video setting a fire inside the store at around 7:30 p.m.
“When officers arrived, smoke could be seen coming from the inside of the store,” York Regional police said in a release.
The store was evacuated while crews contained the blaze. It remains closed.
Neighbouring businesses were also evacuated.
“After the fire was lit, the suspects left the store and walked south through the parking lot towards Rutherford Road,” police said.
Police said that as a result of media coverage and social media, the two suspects in the surveillance footage were identified as youths.
The investigation is ongoing.