Three teenagers have died following a crush at a St Patrick's Day disco in Northern Ireland.
Two 17-year-olds and a 16-year-old were left dead after a "large crowd" of revellers tried to get into the Greenvale Hotel in Cookstown.
The incident took place at around 9.30pm on Sunday, and the Police Service of Northern Ireland (PSNI) said "an extensive police investigation" had begun.
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Assistant Chief Constable Mark Hamilton, speaking from the scene, said: "Our preliminary investigations show there was a crush towards the front door of this hotel, and in that crush people seem to have fallen.
"There seemed to be a little bit of struggling going on to get people up off the ground and that might explain also why there was a report of some fighting."
He added: "We are of an open mind ... it looks like a crowd of young people, a large crowd, pushing up against the front of the hotel to get in to this event."
The incident took place at the Greenvale Hotel in Cookstown, Northern Ireland
Mr Hamilton made a direct appeal for people with footage of the incident to hand it to police, rather than post it on social media.
A 16-year-old girl is currently in hospital following the incident, and two other teens have been treated for injuries they sustained.