A cyclist was pushed from his bike by a passenger in a van in the Northamptonshire village of Weekley.
The cyclist was riding from Weekley to Kettering when he was pushed at about 7.20pm on Friday, August 21.
He fell on to the grass and did not suffer any injuries.
It is thought the passing vehicle could have been a blue or grey Renault Trafic with a registration plate which began with a B.
Witnesses, or anyone who knows anything about this incident, should call the police on 101 or Crimestoppers on 0800 555111.