Gardaí are liaising with local schools in Swords, Co Dublin and Ashbourne, Co Meath after a fight broke out between two groups of young people last Friday.
The majority of the people involved appear to have travelled from Swords to Ashbourne by bus.
The group entered a multi-story car park, where they approached a small group of people who immediately dispersed.
One person was assaulted and gardaí made three arrests.
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Investigations are ongoing and gardaí are in the process of interviewing a number of other people involved in the incident.
