Trae Joseph Keenan (24) had attended the Emerge music festival at Boucher Playing Fields on Saturday before going back to a rented apartment in the Victoria Place complex on Wellwood Street, Belfast, where he was staying with friends.
However, the father-of-one became unwell in the AirBnb rental property and passed away on Sunday morning.
A funeral mass will take place at 10am on Friday in The Our Lady of the Assumption Church in Newcastle, Co Down.
Mr Keenan will laid to rest in St Patrick’s Cemetery, Bryansford, following the service.
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It is believed Mr Keenan, who was from the Castlewellan area, suffered a cardiac arrest after having a panic attack and that he had not been feeling sick at the music event in the hours preceding his death.
He has been remembered as the son of Pamela Keenan and John Crawford, partner of Tiffany Morgan, father of Mason Patrick Keenan, grandson of Geraldine and Gerald Keenan, and brother of Shanice, Tyler, Claire, Toni, Nikki, Marti and Jimi.
On Monday, a PSNI spokesperson confirmed that “police attended an address in the Wellwood Street area of Belfast city centre on Sunday morning, in support of colleagues from Northern Ireland Ambulance Service”.
“A man aged in his 20s was taken to hospital, and later died,” the spokesperson continued.
“Enquiries are ongoing and a post-mortem examination will take place in due course.”
Trae Joseph Keenan
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Police have also today confirmed that an investigation is ongoing into the death of a 17-year-old girl who became unwell during the Emerge festival.
The teenager later passed away in hospital, the PSNI said in a statement on Tuesday.
Two other individuals – a woman in her 30s and a teenage boy – were further taken to hospital after falling ill at the same event, which took place over two days.
The PSNI added that officers remained at the festival site yesterday, and confirmed that seven arrests were made over the course of the weekend.