Detectives in St Helens are continuing their hunt for a man who assaulted the same woman three times on different occasions.
A police spokesman confirmed officers had no made any arrests over the incidents, which all took place in early September.
The victim was first attacked when she walking along Nutgrove Hall Drive in Thatto Heath at around 11pm on September 6 when the man approached her and asked for her telephone number.
When she refused he grabbed by the throat but she was able to kick him and he walked away in the direction of Nutgrove MOT garage.
Two days later, at around 10.15pm on September 8, the woman was walking along the same road when she was approached by the same male.
He again asked for her number and when she refused he struck her to the side of the body before walking off, again in the direction of the MOT garage.
The following day, on September 9 between 9.30pm and 9.45pm, the woman was walking along the same street when she was again approached by the man, who shouted at her before punching her in the face causing a cut to her lip.
The offender is described as white, approximately 20 years of age, with brown eyes and dark eyebrows.
He spoke with a Liverpool accent.
On each occasion the male wore a black North Face jacket, zipped up with a hood covering his head. He was wearing black combat style pants and Adidas trainers.
He also had a gold patterned ring on his right hand.
A full investigation has been launched and officers are appealing for any witnesses to contact them.
Insp Andrew Johnston said: “This was a particularly nasty series of assaults on a young woman.
“I would like to reassure people that incidents of this nature are rare and we are doing everything we can to apprehend the person responsible.
“We would appeal to anyone who was in the vicinity of Nutgrove Hall Drive on the dates mentioned, or who recognises the description of the offender, to come forward.”
Anyone with information is asked to contact Merseyside Police on 0151 777 6838 or the confidential Crimestoppers line, anonymously, on 0800 555 111.