A woman who was walking her dog along Main Road, Bilton stopped to speak to another elderly woman, when she was pelted with eggs from a passing car.
The victim described the car as being a small, old vehicle, blue in colour, which was travelling quite slowly as its occupants threw the eggs at her, hitting her in the neck and lower body.
Following the incident the vehicle continued in the direction of Wyton.
The 70-year-old woman suffered bruising and swelling to her neck but did not require medical attention.
Anyone who has any information in connection with this incident, is asked to contact Humberside Police on the non emergency number 101 quoting crime reference number 1915704 or Crimestoppers anonymously on 0800 555 111.