An investigation is underway in Belfast after 60 teenagers had to be treated for the effects of drink or drugs at a gig.
Medical teams declared a major incident last night due to the number of people needing help outside the Odyssey Arena.
15 were taken to hospital.
The venue claims the teens arrived "intoxicated" and weren't allowed in to the Hardwell gig.
The DJ is performing at the O2 in Dublin tonight.
This man was outside the Odyssey last night - and said he was shocked;