Three people are injured after an early morning fire at a west end apartment building.

The fire at Cambridge West Apartments at 166 Street and 88 Avenue was reported at 4:40 a.m. Tuesday morning, and crews arrived on the scene within six minutes.

The hallways of the four storey building were filled with smoke and several people were rescued off of their balconies.

One person suffered serious injuries and was transported to hospital in critical condition. At least two people were treated for smoke inhalation.

The fire was contained to one suite on the second floor and was fully out by 5:30 a.m..

Investigators remain at the scene but residents were allowed back into the building before 7 a.m. 

Damages are estimated at $300,000, the cause of the fire is still under investigation.