12/28/2011 09:50 am ET

Kayla Bell, 3, Dies In Crash En Route To Hospital During Asthma Attack

A 3-year-old Aurora girl having an asthma attack died Monday after her mother allegedly lost control of her vehicle while the pair sped to a nearby hospital.

Kayla Bell's mother Carla Bell, 30, was attempting to pass a Jeep while en route to Rush-Copley Medical Center when she swerved between lanes, sideswiping the vehicle and losing control of her car, police told the Chicago Sun-Times. Bell's Subaru Outback left the road and crashed into a fence.

A nearby police officer heard the crash and responded immediately, finding Kayla not breathing, but without signs of major injuries despite not being secured in a car seat, the Sun-Times reports. The officer performed CPR, but Kayla was later pronounced dead at the hospital.

An autopsy scheduled for Tuesday afternoon will determine whether the child died from the asthma attack or injuries from the crash, according to the Chicago Tribune. Carla Bell was treated for head injuries, and the driver and passenger in the Jeep were not hurt, police said.

Police are investigating the incident.