Police say they are aware of drug taking and anti-social behaviour issues in Homefield Park in Worthing.
Adur and Worthing Police are appealing to anyone with information to get in touch.
A police spokesman said: “Adur and Worthing Police are aware of ongoing issues in Homefield Park relating to anti-social behaviour and drug taking.
“If you witness any suspicious activity in the park and around the skate park please contact us.”
Speaking earlier this year, Worthing’s district commander Chief Inspector Miles Ockwell said there had been some increased reports of drug dealing in Homefield Park, but said police have put a ‘quite significant’ number of additional policing into that area.
Anyone with information about problems in the park should contact police online or call 101.