Just before 6:00 pm Friday evening, San Bernardino County Fire Department responded to reports of an apartment fire at the Park Heights Apartments located at 2100 Arden Ave. Arriving engines located one unit of a multi apartment complex well involved with fire. A second alarm was initiated. Firefighters were able to obtain a knock down on the fire within 25 minutes. The red cross was called out for families that are displaced. The cause of the fire in unknown at this time.