Northumberland Police are investigating a rape allegation
Officers said the 18-year-old victim was walking along a footpath in the early hours of Saturday morning.
They said a man in a car stopped and offered her a lift and she got into the vehicle.
But after driving a short distance the attacker pulled into a lay-by and raped the girl.
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The attack was carried out on the A197 near Morpeth
The attack was carried out near Morpeth, Northumberland.
Police said the woman walking along the footpath of the A197 near Morpeth Golf Club between 2.30am and 5am on Saturday when the man pulled up in his car.
He is described as white, in his late 50s to early 60s, short in height and of big build.
Officers from Northumbria Police are investigating
Please do not get into a car with someone you do not know
Detective Inspector Paul Race
His hair is short and white or grey in colour and he is believed to be clean shaven and possibly wearing glasses.
He spoke with a local Tyneside accent and was driving a small to medium sized dark coloured car.
Specialist officers are supporting the victim at this time and enquiries are ongoing.
Police have warned women not to accept lifts from strangers
Detective Inspector Paul Race said: "This is a very concerning incident and we are doing all we can to identify the man involved as soon as possible.
“I would ask anyone who thinks they have any information that could help us to contact us immediately on 101.
“I would also urge women, and men, not to accept lifts from strangers. Please do not get into a car with someone you do not know."
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