Police are warning that they will take a zero tolerance approach to trouble ahead of an open air party planned by teenagers in York.
Officers say they are aware of a social media post “which is drawing interest from predominantly teenagers and encouraging people to meet up at an open area in the city”.
And they say they are not prepared to allow bad behaviour.
Senior Commander for York Superintendent Mark Khan said: “I want to issue a clear warning now.
“We will have a large policing presence on Monday evening in York and we will robustly deal with any offences.
“I make no apology for taking this event seriously. Our residents’ quality of life is something I feel strongly about and we won’t allow a large party in a public space to get out of hand.
“We all have a responsibility to look after our communities and ensure everyone can enjoy the local area safely.
“I am also asking parents to please make sure you know where your children are.
“As summer draws to a close and the new academic year is set to begin imminently, I would ask you to think about the consequences that your child would face if they committed an offence which resulted in police action.”