Three people were injured in a fire at a senior apartment complex on Chicago’s Northwest Side.

A fire broke out at a senior apartment building on Chicago’s Northwest Side, causing three people to be hospitalized.

Around 6:40 a.m. Tuesday, emergency crews were called to the West Byron Place Senior Apartments, located at 2815 West Byron Street. According to officials, a fire was discovered in a fourth-floor apartment and was quickly extinguished.

One person was removed from the unit in critical condition, according to officials.

According to the Chicago Fire Department, firefighters performed CPR on the scene before transporting the victim to the street level, where medics continued to work to save her life. She was then taken to a nearby hospital.

The fire department stated that they canvassed the building to ensure that no other residents required assistance following the fire.

The building, according to officials, had operational fire detectors.

The cause of the fire is still being investigated.