The cause of a fire that displaced about 25 University of Colorado students Sunday is under investigation.
The fire at a condominium complex in Boulder evacuated residents in 36 units.
CU is offering free housing for the students for up to a week.
Fire officials say it appears the blaze began on the third floor of a building with 18 units and may have started on a balcony.
Gas, electricity and water had to be shut off to the building and another 18-unit building connected by a breezeway. Both buildings were evacuated.
The Red Cross says it provided assistance to 56 people.
One firefighter was treated at a hospital for undisclosed injuries and was released. No residents were hurt.