Investigators are working to determine what caused a fire at an apartment complex in the Domain early Wednesday morning.

Fire officials said the fire at the building along Feathergrass Court started around 2 a.m. Wednesday on a public balcony. Residents were forced to evacuate after smoke spread into the hallways, but all were allowed back inside once the smoke cleared.

Officials added there is no smoke or water damage. A damage estimate has not been released as of 5:30 a.m. Wednesday.