A Dublin teenager has been seriously injured following a fight allegedly pre-planned on social media.
He's being treated at Beaumont Hospital after the row in Swords.
The 17 year old was found unconscious outside a coffee shop at Airside Retail Park just after 1.30am on Sunday morning.
Detectives are investigating whether he was punched during the fight.
Gardaí are appealing for anyone with information to come forward.