Buses carried young people to an illegal gathering in Tildarg just north of Ballyclare in Co Antrim on Saturday night.
Over the last number of weeks, illegal raves have occurred in the Mid and East Antrim area and in Antrim and Newtownabbey.
Young people, some of whom are are underage, were found to have been drinking alcohol and then left to find their own way home from forested areas.
Police are reminding young people, parents and guardians about the dangers associated with illegal raves, particularly when attendance in is contravention of the Health Protection Regulations.
Superintendent Michael Simpson said police were made aware of buses transporting young people to a gathering in the Tildarg area.
“The dangers of these events are clear. We have young people, some who are underage, consuming alcohol and potentially being left to find their own way home from forests and other areas out of the way, which are often poorly lit. They are putting themselves and others at risk, particularly when it comes to social distancing breaches,” he said.
“We are speaking with bus operators to remind them about their responsibilities and will continue to respond to reports, particularly where we believe young people are putting themselves in a vulnerable position.”
He is asking parents to be aware of where their children are.
“If you are a parent or guardian reading this then please speak to your children about the dangers involved in attending unauthorised events and be confident you know they are safe when they are heading out,” added Superintendent Michael Simpson.