Hunt for man who attacked NSW schoolgirl

A manhunt is under way in NSW for a chubby man who abducted and sexually assaulted a schoolgirl in broad daylight near Newcastle.

Police are throwing every resource into finding the man, who grabbed the 11-year-old girl from behind as she walked to school on Tuesday morning through Hudson Park in the suburb of Adamstown Heights.

The girl was then threatened with a knife, sexually assaulted and forced into a car - believed to be a red Holden Commodore - and driven to bushland where she was again sexually assaulted before being released at Kotara Railway station about five hours later.

She walked 1.5 kilometres on her own before raising the alarm at home and was taken to John Hunter Hospital for examination.

Officers have been doorknocking in the neighbourhood and distributed pamphlets describing the attacker.

They say he is chubby, with short black messy hair and wrinkles on his forehead and around his mouth. He spoke with an Australian accent.

The attacker could also be a smoker, as the young girl described him as smelling of cigarette smoke or body odour.

Brown stains on his bottom row of teeth and cracked lips were also visible despite the fact he was wearing a dark-coloured zipped-up hoodie that covered part of his face.

He wore beige-coloured shoes and denim jeans.