Gardai are investigating an alleged assault at the Oxygen festival in Punchestown last night.
A man has been arrested and is being held at Naas garda station.
The incident happened at approximately midnight. It is understood that four or five people became involved in an altercation during which a 28 year old man sustained a stab wound to his neck after being struck by a bottle.
He was taken to St James's Hospital where his condition is described as stable.