Police are searching for a motorist who pulled into a slip road before getting out to commit a sexual act in front of a woman on Saturday.
The 24-year-old victim was walking along the A6 from Barton towards Luton between 5.20pm and 5.40pm when a silver BMW – possible a Three Series with the number 33 in the registration plate - pulled up in a slip road ahead of her.
As the woman approached the car, the offender got out of the vehicle and appeared to be committing a sexual act.
The man then made several sexual comments towards the victim who became extremely scared and ran across the carriageway.
When she looked back, the offender had got in his vehicle and driven off towards Luton.
Officers are keen to speak with anyone who may have passed the incident as it took place or may have seen the offender who is described as being a white man, 34 to 38 years old, around 5ft 10ins tall, solid build and with a shaved head and receding brown hair,
He was wearing a white shirt, black trousers and black sunglasses.
If you have information relating to this incident, contact PC Jamie O’Leary, in confidence, on the non-emergency 101 number, or text information to 07786 200011.
Alternatively contact independent charity Crimestoppers, anonymously, on 0800 555 111, or online at crimestoppers-uk.org.