A woman who was sleeping with her 4-year-old child was struck and killed when a car came crashing through the wall of her apartment building in the Broadway-Manchester neighborhood of South Los Angeles Wednesday morning.

The solo-vehicle crash was reported about 5 a.m. in the 8700 block of Main Street, Los Angeles Fire Department spokesperson Nicholas Prange stated in a news alert.

Responding firefighters had to put out a small fire that resulted from the car going into the building, Fire Department Battalion Chief Joe Lopez said.

Two people, a woman who was driving and a male passenger, had to be extricated from the vehicle and were in critical condition, Lopez said.

The crash caused fragments of the wall to fatally strike a 45-year-old woman who was sleeping inside her apartment, Los Angeles Police Department Capt. Jon Pinto said.

Lamonte Brown Jr. identified the woman as his mother, Nicole Marks Brown. LAPD had described the other victim as her 4-year-old son, but Lamonte Brown Jr. told KTLA that it was his baby sister.

He said he was inside the apartment at the time and heard the crash.

Other family members previously identified the woman as Nicole Soil.

The child was transported to a local hospital with minor injuries, Pinto said earlier.

Speed may have been a factor but authorities were still investigating the cause of the collision, Pinto said.

Authorities are also trying to determine if there was any impairment to the driver at the time of the crash.