A woman had her arm broken in a "violent" attack in Liverpool city centre.
The victim was on Sir Thomas Street, on Wednesday, December 29, when she got into an argument with another woman at around 12.45am.
A man who was with the woman then attacked the victim and repeatedly kicked her.
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The woman was rushed to hospital after the assault to receive treatment for a fractured arm.
She later required surgery for her injuries.
Merseyside police have now issued a CCTV clip of a man and woman who they wish to speak to about the incident.
Officers believe that the two people may have more information about the assault.
CCTV and witness enquiries were carried out by officers after the assault was reported and detectives have issued a CCTV video clip they believe could help with the investigation.
Detective Constable Nikki Summers said: "This was a violent attack by a man on a young woman that has left her with a fractured arm that later required surgery and several bruises.
"I am appealing to anyone who recognises the woman and man in this clip, to come forward.
"We believe they could hold vital information that could help our continuing enquiries.
"The incident happened a few days after Christmas during a busy time of the night when people would have been leaving bars and pubs in the area.
"If you were on or near Sir Thomas Street at around 12.45am and witnessed the incident or anything suspicious and have captured images of the couple on Wednesday morning, please contact police as a matter of urgency."
Anyone with information on this incident is asked to contact @MerPolCC on Twitter or ‘Merseyside Police Contact Centre’ on Facebook with reference 21000894597,
You can also pass information via Crimestoppers anonymously on 0800 555 111, or their online form at https://crimestoppers-uk.org/give-information/forms/give-information-anonymously.
