A woman was sexually assaulted on a bus in Liverpool city centre.
The victim reported that she was touched inappropriately by a man while on the 21 bus at Queens Square bus station.
She said the assault happened at around 7.30pm, on Friday, December 3.
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After the incident, the suspect got off the bus in the Islington area.
Detectives have now issued a CCTV image of a man who they'd like to speak to after the assault.
They believe that the man in the image may have information that can help their investigation.
CCTV and witness enquiries are ongoing to identify the suspect responsible, and detectives have issued images of a man they believe could assist with their investigation.
Detective Inspector Chris Saidi said: "We take reports of sexual assault very seriously, and we are very keen to speak with anyone with information about the incident which took place.
"This was an extremely traumatic experience for the victim, and we are working hard to ensure that the person responsible is identified.
"I am also appealing for people to come forward if you recognise the male featured in these images. We believe he could hold information that could be vital to our continuing enquiries."
If you have any information contact @MerPoLCC or anonymously to Crimestoppers on 0800 555 111 with reference 21000840405.
Anyone who wants to report a sexual offence is asked to call 101 where you will be spoken to by specially trained.
Support for victims is also available through the registered charity the Rape and Sexual Abuse Support Centre Cheshire and Merseyside, who can be contacted on 01925 221 546 or 0330 363 0063 or Rape and Sexual Assault Merseyside (RASA) on 0151 558 1801.
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