The two cars were traveling east, side by side, when one of them struck a median and lost control. The cars criss-crossed and collided, according to the report, and one of them struck a tree and burst into flames.
A 22-year-old pregnant woman was a passenger in the car that caught fire. She died in the crash. The car's driver, 22, and an 18-month-old child were injured and treated at Aria Health-Torresdale Campus.
The other car's occupants, which included a 1-year-old child, were not seriously injured, according to the report.