UPDATED 12/28/11 7:57 a.m.

AURORA, Ill. (CBS) — A three-year-old girl from Aurora is dead, after her mother was in a car accident while driving the little girl to the hospital for an asthma attack.

Preliminary autopsy results indicated Kayla Bell’s death was related to a medical issue and not the car crash, according to Aurora Police spokesman Dan Ferrelli. The statement from Ferrelli did not provide further details.

LISTEN: WBBM Newsradio’s Steve Miller reports

Kayla, of the 1500 block of Victoria Park Circle in Aurora, was pronounced dead Monday afternoon at Rush Copley Medical Center, Aurora police said.

Around 5:50 p.m. Monday, Kayla’s mother, Carla A. Bell, 30, was driving the girl to the very hospital where she ended up dying. Kayla was having an asthma attack and was having trouble breathing, police said.

As Carla Bell headed south on Waterford Drive in her 2002 Subaru Outback, she tried to pass a Jeep Liberty on the left where the road curves at Fox Pointe Drive, but saw a vehicle coming head-on in the opposing lane, police said. So Carla swerved back to the southbound lanes, but sideswiped the Jeep and lost control.

She ended up crashing into a fence on the side of the road, police said.

An Aurora police officer responded, and performed CPR on Kayla until paramedics took her to the hospital.

Carla Bell was treated for head injuries at Rush Copley, police said. No one else was injured.