More than 30 teenagers have been caught drinking underage at a Mansfield park.
Officers are concerned Racecourse Park, in Mansfield, is getting "extremely busy" with teens drinking on a Friday and Saturday evening.
The mess left by the youngsters is causing “excessive” work for the council, while the anti-social behaviour around this area is annoying residents.
A police spokesman said: "If your children are out until 9pm on cold evening please double check where they are as this is not a safe environment."
If you are concerned about underage drinking in your area, please contact firstname.lastname@example.org