OREM, Utah - Officials said they are now investigating the two Orem fires as cases of arson.
Crews were called about a blaze at an apartment construction site near 420 S. State St. at about 3:30 a.m.
Firefighters said they could see the inferno from the point of the mountain.
Authorities said the flames have caused well over $1 million in damages; the building is a total loss and will be torn down.
Orem fire crews were previously called about an off-duty Provo police officer's cruiser that was torched outside his home not too far from the construction site and saw the flames.
Rocky Mountain Power said power has been restored for the more than 5,000 residents who were without after the fire.
No one was injured in either incident.