Convicted November 17 terrorist Christodoulos Xeros, who was arrested last weekend in Anavyssos, southeast of Athens, after a year on the run, was transferred on Friday to Domokos Prison in central Greece.

Xeros was originally returned to Attica’s high-security Korydallos Prison after his arrest but was moved to Domokos for security reasons as authorities discovered that he and his accomplices had been planning to pack a van with explosives and detonate it outside Korydallos Prison in order to help members of the urban guerrilla group Conspiracy of the Cells of Fire escape.

Police believe a stolen van, which was found on Thursday in the western Athenian suburb of Aegaleo, is likely the vehicle Xeros had planned to use in the jail hit.