The hunt for a serial 'sex offender' in Newbury has dragged on into its sixth month.

A young man is wanted for four incidents including sexual assault or exposure, such as taking off his trousers and touching a woman inappropriately from behind, according to Thames Valley Police.

The force believe the same person followed a dog walker before exposing himself in front of her and performing an indecent act.

Detective Inspector Bill Sykes, based at Newbury police station, said: “This is obviously very concerning and extremely inappropriate behaviour so it’s important we identify and speak to this person as soon as possible.

“There may be incidents that have not yet been reported to us and I want to encourage any victims who have not yet contacted us to do so.”

He added: "Someone must know who he is."

The first incident was reported on March 27 in Hutton Close, when a man entered the car park of the Willows Edge Care Home and exposed himself from the waist down.

On the evening of May 21, a man who was naked from the waist down performed an indecent act from behind a fence while looking at properties in Huntington Gardens, according to police.

He didn’t stop when he knew he was spotted.

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A man with no trousers on allegedly approached a woman from behind who was walking past the Riverside Community Centre at 11.30pm on June 17, touched her inappropriately over her clothing and ran away.

Reading Chronicle: A man police would like to speak to in connection with an investigation into sexual assault or exposure casesA man police would like to speak to in connection with an investigation into sexual assault or exposure cases

The final reported incident occurred at 11.50pm on July 1, when a male was seen loitering in Shaw Park by a female dog walker.

He stayed in a dark area of the park and waited for the woman to walk past him before following her to Dene Way, where she stood under a streetlight and waited for him to pass.

As she turned around, she saw the male expose himself and perform an indecent act, police said.

The woman immediately called the police and the male turned and ran back towards Shaw Park.

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DI Sykes said officers are conducting extra patrols across Newbury and members of the public should  feel free to speak with them about any concerns they have.

He said: “We have several images of a man who we believe may have vital information about these incidents, but I appreciate the quality is poor.

“I would encourage people to please come forward if you recognise this man or have any information about him or the incidents, which could help our enquiries. This can be done via 101 or on our website.

“You can also provide information anonymously to the independent charity, Crimestoppers, by calling 0800 555 111 or via its website.”