Police have arrested a pregnant mother they say was passed out at the wheel at a traffic light with her 10-month old child in the back seat and heroin in the car. Natalie Onay, 22, told police she had injected the drug before losing consciousness.

She had stopped at the traffic light on North Governor Street and East Columbia Street, in Evansville, Indiana.

The driver behind her had said that the lights turned green at least twice before he beeped at her and the car rolled forward slightly.

In the backseat of the car was her 10-month-old who was taken in by the state's Department of Child Services. Police said that .10g of heroin was found in the car along with a syringe, Fox59 in Indianapolis reported.

Onay told police that she was five months pregnant and had injected heroin 10 minutes prior to passing out. She was taken to hospital before she was booked.

Online jail records show that Onay faces changes of child neglect, possession of narcotics, paraphernalia and a syringe, and operating a motor vehicle while intoxicated.

She was booked at at Vanderburgh County Jail on Monday 11 December and later released on bond.