Three teenagers have been arrested in connection with an attack on young girls at Howth Junction Dart station last month.
The incident occurred on 1 April at approximately 9pm and was caught on CCTV.
A group of boys spat and kicked the girls as they were running to catch the DART.
One of the girls fell between the gap under a train as she moved to avoid a group of teenagers.
The other girls rushed to her aid as some of the boys dispersed.
The young girl was not seriously injured physically but has been traumatised by the incident
Gardaí investigating the incident have examined the CCTV footage and witnesses as well as victims were interviewed.
Gardaí carried out a series of searches at five homes across north Dublin at around 7am this morning.
Three boys, two 16-year-olds and a 13-year-old were arrested on suspicion of violent disorder under the Public Order Act 1994.
A number of items of clothing, bicycles, and mobile phones were also seized.
The three youths are currently detained at garda stations in Clontarf, Raheny and Coolock under section 4 of the Criminal Justice Act.
They can be questioned for up to 24 hours and investigations are ongoing.