Nine people were stabbed at the weekend at a festival headlined by Swedish House Mafia.
The incidents took place at the Phoenix festival in Dublin this Saturday (July 7).
According to BBC reports, one man is understood to have stabbed up to four people, while the others were injured in an incident involving broken bottles and knives.
Three of the victims are understood to have sustained serious injuries with one in a critical condition.
A 23 year old man has been charged with the attacks.
It wasn't the only unpleasant incident at the event with a man in his early 20s passing away due to a suspected drugs overdose.
More than 45,000 people were at the event which also saw sets from Snoop Dogg, Tinie Tempah and Calvin Harris.