The attacker pounced on the 23-year-old in a secluded back lane during the early hours of the morning, leaving his victim terrified and shaken.

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Now, detectives leading the investigation have released a picture of a man they are hoping to trace in connection to the assault.

They believe there are a number of people who might recognise the man and who could hold vital information into solving the case.

Detective Chief Inspector Gareth Craig, of Sunderland area command, said: "I would urge anyone who recognises this individual, or has an idea of who he may be, to contact us immediately."

On Sunday, August 17, the victim was attacked as she walked home after a night out at The Groove nightspot in Concord, Washington.

Detectives believe she was assaulted between 1am and 2.05am in a lane between Washington Terrace and Beverley Court.

The attacker approached his victim from behind as she walked down the lane. He then pushed her to the ground and raped her.

The rapist is believed to have made off in the direction of Spout Lane, leaving his distressed victim lying on the ground.

The man is described as white, 20 to 25, 5ft 7in with short, dark, spiky hair.

He was wearing a white round-necked T-shirt with short sleeves and a black pattern on the front.

Police are also appealing for anyone who may have seen something suspicious at the time to come forward.

Mr Craig, who is based at Washington police station, said: "We would also like to hear from anyone who may have been in the area around the time of the attack who may have information that can assist us in our inquiries."

Anyone with information can contact Northumbria Police on 03456 043043, or Crimestoppers on 0800 555111.