Police are appealing for witnesses following a robbery in Milton Keynes.
Between 5.50pm and 6pm on Monday (Jan 13), the victim, a woman in her thirties, was assaulted by a young man on a redway near Millers Way and Franklins Croft, Greenleys.
The victim was walking on the redway when the offender jumped from behind her and demanded her mobile phone.
Two young men seen riding on a scooter or motorbike drove in front of the victim on the redway, shouting something at the offender before the incident occurred.
An unidentified female cyclist stopped to aid the victim post incident.
The offender is described as a white man in his late teens, around 5ft 9in tall, with a slim build. He was wearing a hoodie and light blue jeans.
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Investigating officer PC Dawn Washburn, based at Milton Keynes police station, said: “I would urge anyone who witnessed this incident or has any information to come forward.
“We are particularly interested in speaking with the cyclist who spoke with the victim after the incident.
“If you think this could be you or you know who this may be, please get in touch.
“We would also like to trace the two young men on the scooter or motorcycle.
“If you have any information about this incident, please contact the Thames Valley Police non-emergency number on 101 or make a report online quoting reference 43200014438.
“Alternatively, if you wish to remain anonymous you can contact the independent charity Crimestoppers on 0800 555 111.”