Pictures released in police appeal after serious sexual assault in Hull
The offence occurred in the West Park area on Saturday February 9.
Officers have said they are keeping an "open mind" about whether the assault was linked with a similar sex offence in the same area late last year.
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Hide AdSpeaking of the man in the picture in an appeal, a Humberside Police spokesman said: "We believe he may have important information that could assist our investigation.
"We are continuing to support the victim and our enquiries are ongoing.
"If you are the man pictured, or you have any information which could help us identify this man, please call our non-emergency number 101 quoting log 372 of 10/02/19.
"If you prefer to report information anonymously you can do so by calling the independent charity Crimestoppers on 0800 555 111."