Windsor Police shut down Ouellette Avenue at Elliott Street overnight while firefighters battled a blaze at a downtown landmark.
Just after midnight on Thursday morning, they were called to the 800-block of Ouellette after flames erupted at a vacant house.
The house, considered an eyesore by some, was painted different colours in recent years.
Police say no one was hurt and the house was vacant at the time.
The Windsor Police Arson Unit is treating the fire as suspicious.
Investigators urge residents and business owners in the area to check their surveillance or dashcam footage for possible evidence.
