Makeshift roadblocks, tossed firebombs and acts of vandalism were reported in central Athens on Tuesday evening at the end of a protest rally by roughly 400 self-styled “anti-state” activists.

Some 30 masked youths broke off from the main rally to begin the disturbances, while riot police were dispatched to the scene and responded with tear gas and stun grenades. The incidents took place outside one corner of the Athens polytechnic on Stournari and Patission streets — a flashpoint for such disturbances in the past.

Earlier, protesters made their way to Parliament to demand an abolition to maximum security prisons in the country, the release of one notorious urban terrorist (Savvas Xiros) and to express solidarity to what they called “political prisoners” incarcerated in Greek jails.