Windsor Fire investigators says two separate fires in a Walkerville multiplex were intentionally set.
Investigators say one fire was set in a stairwel and the other was in a lower hallway.
Two residents were able to escape unharmed.
The Windsor Fire Department was called to Assumption Road around 2:30 a.m. Sunday, where smoke could be seen coming from the structure.
Investigators have estimated damage as a result of the fire at $10,000.
The investigation continues.