CHICAGO (CBS) — A fire on the West Side sent two adults and two children to the hospital on Tuesday morning.

The fire broke out at 4:12 a.m. at 1053 N. Leamington, a two story residence in the Austin neighborhood, and spread to an adjacent building.

The blaze was put out around 4:45 a.m.

Two children were in serious condition at Mt. Sinai Hospital.

One adult was in critical condition at John H. Stroger Hospital of Cook County. Another adult was in serious condition at West Suburban Hospital in Oak Park.

The woman who was critically hurt jumped with her daughter from a second floor window to escape the fire, CBS 2′s Susanna Song reports. A father and his son escaped through a front door.

All are expected to survive.

The ages of the injured were not known.

The cause of the fire is under investigation.