Police have released an image of a man they wish to speak to after a woman was sexually assaulted on a bus in Milton Keynes.
On June 18, at around 4.45pm, a man sat down on the number 6 bus and began inappropriately touching a woman in her 20s.
Anybody who witnessed the attack - or who recognises the man in the photo - is urged to make a police report.
Investigator Beth Willis said: "We are appealing for the man in this picture, or anyone who knows him, to come forward, as we think he could have important information about this incident.
"If you are this man, or if you know him, please contact us on 101, quoting reference number 43240286535.
"Alternatively, you can make a report online, or call Crimestoppers on 0800 555 111."
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