The man who died after an incident in Dublin on Saturday night has been named as 31-year-old Thomas Griffin from Ballyfermot.
Mr Griffin swam across the River Liffey after he was reportedly assaulted at the War Memorial Gardens in Islandbridge, which occurred at around 10.20pm on Saturday night.
He was treated by fire brigade personnel after swimming across the river to lands adjacent to Chapelizod Road.
He was then brought to St James's Hospital, where he died on Sunday.
A post-mortem examination will be carried out today.
Gardaí said the results of the post-mortem will determine the course of their investigation.
They have appealed or witnesses, in particular anyone who was travelling in the area, or any road users with dashcam footage, between 9pm and 10.45pm on Saturday to contact Clondalkin Garda Station on 01 666 7600, the Garda Confidential Line on 1800 666 111, or any garda station.
