Gardaí are appealing for witnesses to an incident in Dublin city on Sunday following the death of a man in his 40s.
Shortly before 1am, gardaí on foot patrol attended the scene of a disturbance on Essex Street East where the man was being restrained by security staff.
The man was detained, but gardaí sought assistance from a nearby ambulance crew as he appeared unwell.
He was taken to St James's Hospital, where he was later pronounced dead.
Gardaí say the results of a post-mortem are not being released for operational reasons.
An Garda Síochána is leading the investigation into the death of the man and Fiosrú will continue to examine the actions taken by An Garda Síochána in responding to the incident.
The scene has been forensically examined and local policing inquiries have been conducted. A Garda Family Liaison Officer has also been appointed.
Gardaí are appealing for witnesses to come forward. They are also asking anyone with video footage - including dashcam footage - from Essex Street East between 12.30am and 1.30am on Sunday 14 December to contact them.
Anyone with information is being asked to contact Pearse Street Garda Station on (01) 666 9000, the Garda Confidential Line on 1800 666 111, or any garda station.
