A local councillor says attacks by groups of teenagers, which are then posted on social media, are getting more violent and dangerous.
Gardaí in north Dublin are investigating following a series of a random attacks.
One victim was placed in an induced coma for a number of days, after he suffered a head injury during an assault.
Gangs of youths - often armed with things such as hammers, golf clubs or bats - are randomly attacking others and posting videos on TikTok.
Local Sinn Féin Councillor Séamas McGrattan told Lunchtime Live this has been going on since last December.
"It started off before Christmas - there was a number of random attacks, and it seemed to be primarily based locally in between Cabra and Finglas gangs.
"But since Christmas it's a much wider... there's gangs coming from different areas.
"They're linking up with gangs from different parts of the city, they're fighting against each other one week [and] they're with that gang the following week.
"It's all organised through social media, primarily TikTok, and it's been videoed and shared around.
"It seems to be getting more violent and more dangerous as it goes on."
He says people need to be aware what's happening.
"The main purpose of this... was just to get awareness primarily out to parents - a lot of people wouldn't be aware that it's happening.
"This isn't a campaign to get kids into trouble, it's the opposite, to try and get them out of trouble."
He says schools and local youth services are also involved, while a leaflet drop was made to houses in Cabra West by Gardaí in recent weeks.
And Councillor McGrattan says he is aware of people who have been hospitalised as a result of the attacks.
"Kids have ended up in hospital with serious head injuries.
"Thankfully nothing more serious has happened - but it's probably only a matter of time as this keeps escalating.
"The nature of the TikTok videos, as I said in The Journal, there's a sort of 'one has to be better than the next'.
"That's only going to result in serious long-term injuries or worse".
He says 'ordinary kids' are getting pulled into a gang mentality.
"These are incidents, they're becoming more and more frequent - and it's kids that normally wouldn't be engaged in this kind of behaviour.
"These aren't thugs going around, it's ordinary kids getting dragged into this mentality - this sort of gang mentality."
He adds: "It's an awareness campaign to parents and to the kids about the serious nature of this.
"I don't think they realise how serious this could be, and the potential damage it'll have on their lives".