Officers want to speak to a woman who disclosed to a passer-by that she was raped in Greater Manchester.
At about 4.30am on Tuesday 9 May a driver stopped on Berry Brow, in Clayton, after noticing a distressed woman.
The woman was extremely upset and said that she had been raped by a man in a small light blue car who had offered her a lift home from Piccadilly train station.
She said he then stopped the car on Rose Hey Lane in Clayton near to Millstream Animal Shelter where the rape took place.
The passer-by took the woman back near to Piccadilly and later reported the incident to police.
Officers have since been trying to trace the woman and despite extensive enquiries they cannot identify her.