A source cited by Belfast Live said that something wrought chaos at the night party that was taking place at a vehicle park just outside the hotel. "Parents are asked to collect children from Family and Friends reception at Glenavon Hotel". Our thoughts are with everyone involved.
Hamilton said the Northern Ambulance had received reports of people injured shortly before 9:30 p.m. Sunday local time and declared it a major incident, calling out police, Fire Service and Environmental Health. "The police investigation is continuing", a later tweet said.
With only snippets of information to work off, it soon became apparent that two young people had died.
'They came home very, very shaken with rumours that some people had died.
A number of other teenagers have also been treated in hospital.
"Police arrived within two minutes of the call from the Ambulance Service and quickly secured the scene".
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"People then seem to have fallen and then got crushed", Hamilton said.
"My immediate thoughts are with the families of the decease, and everyone else who has been affected".
'While the exact cause of the incident is still unknown, there are reports of a crush at the scene'. It will be memorable for all the wrong reasons now.
'A lot of people had congregated outside the Greeenvale and there was a lot of carry on but suddenly all hell broke loose and there was a big panic. "People were running all over the place". Someone was doing CPR on someone on the ground'.
Reacting to the news, the DUP's Keith Buchanan said: "This was a very serious incident at a venue that was obviously very busy on St Patrick's night".
The Democratic Unionist party leader, Arlene Foster, tweeted that her "thoughts and prayers" were "with everyone impacted by this tonight".