A tight security operation involving 175 gardaí and 400 private security personnel was put in place at Marlay Park in Dublin tonight for a sell-out concert by French DJ David Guetta.
The concert was expected to attract a similar demographic to the dance music event in the Phoenix Park seven weeks ago when nine people were stabbed.
Tonight's concert was considered a higher security risk than other events in Marlay Park this weekend.
Around 22,000 tickets were sold. Nobody under 17 was to be admitted.
Sniffer dogs, the garda public order unit and mounted gardaí were on duty.
Full-body searches were conducted at the two entrances and security personnel used metal detector wands.
An exclusion zone was put in place around the venue, backed by a court order. Gardaí could ask anyone to move on from this area.
Promoters MCD said a zero-tolerance policy was in place and anyone intoxicated on drink or drugs would not be admitted.