Police break up fight between rival gangs of youths in Glengormley
Rival gangs of youths were searched by police for knives as officers broke up an "organised fight" on Tuesday evening.
Up to 30 young people threw stones at each other in Glengormley. Detectives searched a number of males after claims they were carrying weapons, but no knives were found.
Police are also reviewing CCTV footage of the incident, and a senior officer said they expect to make further arrests over the coming days.
Northern Ireland has been plagued by organised fights in recent years, as young people set up confrontations using social media and text messaging.
Chief Inspector Stephen Reid said: "Young people should be aware of the consequences of anti-social behaviour in an area and the effect it can have on the everyday lives of residents in the local community.
"You might think that it is just fooling around, but it can result in a serious incident or a criminal record which can affect your travel, education and employment opportunities in the future."
They also urged parents to be aware of where their children are.
A 20-year-old man was arrested on a bench warrant and transferred to court on Wednesday.