A 16-year-old boy has been given a six-month sentence for taking part in violence at a protest in Jobstown in November 2014.
The boy is the first person to be jailed for taking in the protest where Tánaiste Joan Burton and her entourage were allegedly trapped in a car following a graduation ceremony at An Cosán education facility in Jobstown just after midday on 15 November 2014.
An anti-Irish Water demonstration was held which delayed her for about two hours.
Ms Burton and her team had been attempting to travel by car to St Thomas's Church for the rest of the ceremony.
Gardaí allege protesters surrounded the car, tried to "get in at" the Labour Party leader and there were a number of violent incidents during which officers were pushed and missiles thrown.
The boy, who was 15 at the time of the incident, was in court with his mother and a grandparent.
He had pleaded guilty to criminal damage to the rear window of an unmarked garda car which he jumped on, and violent disorder charges.
The court heard he has prior convictions for theft and has already served a sentence which expired in January for his other offences.
Finalising his case, Judge John O'Connor imposed a six-month sentence on the boy who cannot be named because he is a minor.
It makes him the first person to be jailed in connection with the controversial protest which has led to more than 20 people including TD Paul Murphy coming before the courts.
Initially the boy, who was not politically motivated when he joined in the violence, expressed regret and in November he had shown a willingness to engage with the Probation Service.
The judge had then told the boy, who has "significant behavioural" problems, that if he continued to co-operate with the Probation Service to address his offending, he would be sentenced to a period of probation supervision.
Failure to do so would result in a custodial sentence, he had been warned.
However, since then the boy repeatedly refused to work with the Probation Service.
He also picked up a new charge for unlawfully interfering with a car in Tallaght on 11 February.
He pleaded guilty to that as well as connected charges of breach of the peace and possessing gloves for use in a theft.
Mr Murphy and 18 other people from Dublin are awaiting Circuit Court trial.
They face a variety of charges which include false imprisonment, violent disorder and criminal damage to Garda cars.
Five other juvenile males have been before the Children's Court in connection with the protest.
One youth, aged 15, who pleaded guilty to violent disorder was placed on probation for a year in February.
Another boy, aged 16, who admitted the same charge was also sentenced to probation recently.
None of the three teens who have pleaded guilty were politically motivated but got caught up in the incident, the court has heard.
A 17-year-old Leaving Cert student will be tried later this year at the juvenile court; he is accused of false imprisonment of Ms Burton and one of her advisors. He has pleaded not guilty.
Another boy, now 15 but who was then aged 13, has indicated that he is pleading not guilty to a violent disorder charge and his trial date will confirmed in the coming weeks.
Last week an 18-year-old youth was cleared of committing violent disorder.
