The three – two aged 16 and one aged 13 – were arrested when officers rushed to three different properties in Dublin yesterday morning.
They are believed to be involved in the terrifying incident last month in which a 17-year-old girl fell between a train and a station platform.
During the attack – which was captured on CCTV – the young girl fell as she moved to avoid one of the teenagers as he rushed towards her.
She was helped by other passengers at Howth Junction Dart station.
The three boys were then released without charge.
A file will be prepared for the Director of Public Prosecutions. All three are questioned on suspicion of violent disorder.
Bicycles, clothes and cell phones were also seized during the Garda operation yesterday.
We can also reveal that the trio are suspect for other public order incidents in the Howth area over Easter.
A source said: “The young suspects were questioned about a very serious incident in which a teenage girl could have been killed. The incident was a blatant intimidation of people going about their daily activities.
During the 1 p.m. incident on April 1, CCTV footage showed a group of ten teenagers, some with bicycles, moving along the platform at Howth Junction.
A group of three girls run by them as they try to catch the dart and one of the boys is seen swinging his leg towards one of them. In another shocking incident, a teenage thug spat on one of the girls.
“SHE COULD BE KILLED”
But as the girl tried to avoid the thug, she slipped and fell on the trail. Although she suffered no serious injuries, her father told The Irish Sun that she “could have been killed”.
He said, “She’s fine now, she’s still a little upset about it.”
“I heard there had been arrests, okay. I don’t know what will come out of it.
“All we can do is wait and see what happens. “
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When asked how her daughter is doing after the yob ordeal, her dad revealed the brave teenager is bouncing back.
He said: “She’s fine considering. “
The investigation into the incident is being carried out by detectives at Raheny Garda station. A number of young women targeted on April 1 were also interviewed by Gardai.