The Leeds Inner North East team said around 58 rockets had been taken from a number of young people in Potternewton Park in north Leeds.
A spokesman said: "We have been working with our partners to tackle anti-social behaviour and the misuse of fireworks in the Chapel Allerton and Chapeltown areas of Leeds recently.
"We appreciate and understand that this is a subject that local residents are concerned by.
"Rest assured, we are doing all we can to tackle this type of behaviour – especially over the trick-or-treat and bonfire night periods."
Police have been obtained details of the youths involved and intervention work is being carried out by the Leeds Anti-social Behaviour Team at Leeds City Council and local officers.
Anyone wishing to report concerns can contact the team via 101 or make an online report.