Enoch Burke has been arrested and brought to Mountjoy Prison on foot of an order issued by the High Court last week which directed his imprisonment for contempt of court.
Mr Justice Brian Cregan said in his ruling that Mr Burke and his family had engaged in the most deliberate, sustained and concerted attack on the authority of the civil courts and the rule of law in this country in recent times.
He said Mr Burke had been ordered by the court not to trespass on the school premises.
He ruled there was no other option left but to imprison him again, as he had refused to obey the order for the last three years.
Mr Burke has already spent more than 500 days in prison for contempt on three occasions since September 2022.
He has been attending at Wilson's Hospital School since it reopened after the summer holidays.
Following the issuing of the order, gardaí had attended his home in Castlebar in Co Mayo on a number of occasions last week, and left each time without Mr Burke.
Mr Burke has not been seen at the school since the order was issued.
However, on Friday, it's understood he attended the school for a short period and recorded a video outside the grounds.
Today, it's understood Mr Burke returned to the school and gardaí received a call alerting them to his presence.
