A man has been arrested after a woman was sexually assaulted in Aylesbury early this morning.
The 21-year-old victim was walking away from the town centre along Gatehouse Road at about 1am as she made her way home from a night out.
She was grabbed by her shoulders, pushed to the ground and sexually assaulted.
A police patrol was passing the area and the woman was able to get their attention.
Shortly afterwards officers arrested a 34-year-old man, who remains in custody.
The offender is white, about 6ft tall, of slim but athletic build, with short spiky hair.
Anyone who witnessed the incident, or saw the man or the victim before or after it, should contact Det Con Deborah Lord by calling 101.
Alternatively you can contact Crimestoppers anonymously on 0800 555 111 or via crimestoppers-uk.org