It happened yesterday evening.
Around 100 teenagers gathered for a pre-organised fight in Dublin last night.
The incident is the latest pre-arranged fight between feuding gangs took place at east tea more park in ballyfermot.
At around 6:30pm clock last night gardai were called to the scene after dozens of teenagers took over the area.
Locals residents say some of them brought homemade weapons with them.
Gardai say and investigations are ongoing into the public order incident.