Calgary Police believe the fire in Mount Pleasant on Tuesday was intentionally started.
The fire began around 3:15 a.m. in the 400 block of 30 Avenue northwest at a home that was still under construction.
READ MORE: Calgary firefighters battle blaze at house under construction in Mount Pleasant
No one was home at the time, but the home was completely destroyed. A person dressed in dark clothing was spotted riding a bicycle in the area when the fire started.
WATCH BELOW: Early Morning fire in Mount Pleasant
Police said in a news release Thursday, that same person later returned to the burning house and was last seen travelling north along 4 Street northwest.
Investigators have released images from nearby CCTV footage.
If you have any information about the man on the bike or the fire please contact the police at 403-266-1234 or Crime Stoppers.