Deputy First Minister of Northern Ireland Martin McGuinness said the events of last night in Belfast, where 60 young people were treated by paramedics for the effects of drugs and alcohol, were "shocking" but that he was relieved all those affected were safe.
UTV reporter Marc Mallett has been told by a a consultant from Belfast's Royal Victoria Hospital that the symptoms of those taken to hospital following a major incident at a concert are consistent with 'drugs and alcohol misuse'.
Doctors have been put on standby at the Ulster, Mater and Royal hospitals, in Belfast and total of 15 people have been admitted to hospital. The are 11 people at the Royal and four at the Mater, said to be in a in a stable condition and are being kept overnight, according to UTV.
A Northern Island Ambulance Services spokesman said they dealt with casualties "at varying levels of consciousness".
Two students have said that 'people jumped the barrier' of the standing area of the concert at the Odyssey Arena in Belfast where are least five people have been taken hospital.
A number of people involved in the major incident in Belfast tonight were unconscious at the scene and five people were taken to hospital, John McPoland, spokesman for the Northern Ireland Ambulance Service told UTV.
Ambulances were lined up outside Belfast's Odyssey Arena tonight as both the Northern Ireland Ambulance Service and Ulster Hospital declared a major incident involving around 60 young people.
The youngsters were said to be suffering from the ill-effects of alcohol and drugs - at varying levels of consciousness.
A spokesperson for the South Eastern Trust said they were aware of an incident involving a bus at the arena.
Emergency services in Belfast are still dealing with a major incident after treating around 60 young people for the effects of drink and drugs outside the city's Odyssey Arena.
A 'major incident' was declared in Belfast by both the Northern Ireland Ambulance Service and the Ulster Hospital after 60 young people were treated for the effects of drink and drugs, sources told UTV News.
An ambulance spokesman said they are dealing with casualties believed to be suffering ill-effects of alcohol and drugs, at varying levels of consciousness.
A spokesperson for the South Eastern Trust said they were aware of an incident involving a bus at the Odyssey Arena.