He was arrested on Thursday on charges of illegally possessing explosives.
Police officers quickly arrested Świtoń for possessing explosives and making public threats.
The Maguire Seven are found guilty of possessing explosives and subsequently jailed for 14 years.
They have also pleaded not guilty to causing the explosion and possessing explosives with intent to endanger life.
Mr. Hamadei also faces charges of possessing explosives, which he has effectively admitted.
Musumeci and Belmonte were also convicted for possessing and transporting explosives.
He was also accused of possessing explosives.
The legality of possessing or using explosives varies by jurisdiction.
Other party members were accused of possessing weapons and explosives but the prosecution's case failed to progress.
On October 31, 2001, she accepted a plea bargain and pled guilty to two counts of possessing explosives with intent to murder.