A video circulating online has shown the moment a man was brutally assaulted at Dún Laoghaire Dart station.
The incident occurred shortly after midnight on Friday, August 12.
Footage shows two men exchanging heated words before one man punches the other to the ground.
Once the man falls, the attacker continues to punch the victim in the upper body, and soon begins to kick him.
A shrill scream can be heard as a woman jumps in to try and help the man receiving the blows.