Police are appealing for information from the public following an attempted robbery in Blacktown on Sunday.
Just after midday August 19 a woman was in her car stopped at lights on Alpha Street with three children in the back seat.
A man has opened her passenger car door, sat in the seat and threatened her.
The woman started screaming for help and struggled with the man. He left the vehicle and was last seen running towards Alpha Park.
The man has been described to police as Caucasian in appearance, fair skinned, very skinny build and aged in his late thirties to early forties.
He is about 168 centimetres tall and was wearing light-coloured jeans and a grey hooded jacket.
Anyone with information about this incident should call Crime Stoppers on 1800 333 000 or use the online reporting page: https://www1.police.nsw.gov.au/.