Police are investigating the dying of a lady at Lux nightclub in Belfast Metropolis Centre within the early hours of Sunday morning.
Police, paramedics and fireplace crews have been referred to as to the venue at about 02:20 GMT after studies that two girls had fallen unconscious.
Police mentioned that after they arrived one of many girls, who was in her 20s, had died.
The opposite girl was taken to hospital the place she is present process therapy.
In an announcement, a spokesperson for Lux mentioned: “Our ideas and sympathies are with the dad and mom and household throughout this very troublesome time.
“Our focus is now to assist the police with their investigation and our workers wellbeing.”
The nightclub will probably be closed on Sunday night.
Hospitality Ulster mentioned it was “deeply saddened by the information”.
“No one ought to ever go on an evening out and never return house,” its chief govt Colin Neil mentioned in an announcement.
Police have appealed for anybody with info to get in contact.