The company which organlised Saturday's Club MTV event in Derry/Londonderry says it's considering barring under 18's from future events.
Dozens of young people had to be treated at Altnagelvin hospital for assault, alcohol or drug related conditions during and after the Ebrington Square gig.
A & E staff were stretched to capacity after an influx of 13 to 25 year olds - most of whom were intoxicated with alcohol or recreational drugs or both.