Belfast City Council is to issue warning letters to the parents of children involved in anti-social behaviour in its public parks.
Over the summer the council targeted eight areas as part of a pilot project aimed at combating the growing problem.
It found teenagers are the main culprits when it comes to drinking and vandalism.
Project co-ordinator Laura Hamill said further action would be taken if youths re-offended.
"In the past, I think there was a certain reluctance by people to report anti-social behaviour, especially in parks - they just shrugged it off as a fact of life," she said.
"However, since the project started, we have noticed an increase in the number of people coming forward and saying 'enough is enough' - because they know we are taking action to combat the problem.
"And those engaged in the anti-social behaviour know that we are going to catch them and deal with them."
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