Yobs broke into the grounds of a cricket club and left offensive graffiti on the walls of the changing rooms.
Police are appealing for witnesses to the criminal damage caused at the Memorial Sports Ground in Sywell Road, Wellingborough.
A police spokesman said: “The offender/s broke into the grounds and wrote offensive graffiti on the walls of the Wellingborough Indians Cricket Club changing rooms.”
It took place sometime between 8pm on Thursday, September 19, and 10.30am on Friday, September 20.
Witnesses to this incident, or anyone with information about it, can call Northamptonshire Police on 101 or information can be given anonymously to Crimestoppers on 0800 555111.