The Conspiracy of Fire Nuclei took part in several terrorist attacks, including attempting to send parcel bombs to a number of embassies in Athens in 2010.
According to local media, some 60 people took part in the seizure of Syriza headquarters. Currently, the spokesperson for Syriza and the party’s secretary remain inside the building having locked themselves up in their offices.
The activists demand freeing the relatives of the Conspiracy of Fire Nuclei members, who were arrested earlier in March on suspicion of aiding terrorist activities and another radical left activist, who was injured during a failed bombing attempt in 2002.
The group also demands the government to reduce the length of maximum prison term from life sentence to 12 years and the length of pre-trial detention to a maximum of 12 months, as well as to allow prisoners use Internet.
Syriza, or The Coalition of the Radical Left, won the majority in the Greek parliament during the election in January.
