GREENSBORO, N.C. -- The Greensboro Fire Department has completed its investigation to determine what caused a 4-alarm fire at UNCG's Spartan Village Apartments in March.
Firefighters said a propane heater was the probable cause for the March 14 fire in a vacant apartment building that was still under construction.
Read: Greensboro Firefighters Battle 4-Alarm Apartment Fire Near UNCG
Deputy Fire Marshal Todd Lynch said in a news release Monday that the fire started on the second floor before spreading to the attic. He said based on the investigation, there was no reason to believe the fire was set intentionally.
The fire department estimated the fire caused $11 to $12 million in damage.
Spartan Village Apartments is a four-building complex on West Lee Street that was scheduled to open in the fall of 2013. There were no sprinklers in building number two because construction was not yet complete. The remaining three buildings were not substantially damaged.
Read: Crews Demolish Part Of Burned UNCG Apartment Building
No students were injured; most UNCG students were away for Spring Break.
Seventeen students living in the neighboring Lofts on Lee were evacuated.
The fire department said about 75 firefighters were dispatched to the burning building.
UNCG said in a statement in March that the cost of the multi-building Spartan Village project is $52.5 million. Each building was designed to house 200 students.
In June, UNCG said the remaining three buildings were on schedule to open by the start of the 2013 school year.