Gardaí are investigating all of the circumstances surrounding the discovery of a body of a male in Ranelagh.
The 22 year old was discovered with a head injury at around 4.40 this morning outside the Luas stop on Ranelagh Road.
He was taken by Ambulance to St James Hospital where he was pronounced dead on arrival.
The scene is preserved for technical examination and the Coroner has been notified.
Gardai are reviewing local CCTV and results of a post-mortem examination will determine how they investigate the case.