A man is in a serious condition after he was assaulted in Dublin city centre in the early hours of Sunday morning.
The incident happened in the O'Connell Street Upper area at around 1.15am.
The man, who is in his late 20s, received head injuries after a reported altercation with a group of men.
He was taken to the Mater Hospital.
Gardaí are appealing for witnesses to contact them at Store Street Garda Station on 01-6668000.