Investigators say they have determined where a destructive fire started in Innisfil on Friday.

The Ontario Fire Marshal’s Office finished their investigation on Monday and says the fire that destroyed two homes and damaged a third originated in the garage at 509 Mapleview Dr.

Investigators say the fire caused a total of $750,000 to all three homes, but because the fire was so intense, a cause was undetermined. No injuries are reported.

Innisfil Fire Chief Jon Pegg says the battle was a difficult one, as there were no hydrants in the area.

The properties have now been returned to the owners and their insurance companies.