Protestors reach parliament square, light flares
Rome tourists run for cover, shops close amid havoc31 October, 15:15
Four police officers and two protestors were taken to hospital with injuries that were reportedly not serious, while about 10 others - mostly police - received medication on the spot.
Police sealed off access to Premier Enrico Letta's office, which is adjacent to the House, as around 300 protestors shouted "we won't stop".
Earlier on Thursday police fired tear gas to dispel protestors when clashes occurred after officers tried to haul down people who attacked and climbed onto a police armoured van.
Chaos ensued with tourists running for cover after protestors poured off a main street into the area of the famous Trevi Fountain to escape the tear gas.
Some shops in one nearby street rolled down their shutters and security guards at an elegant shopping centre near the premier's office locked the doors for 10 minutes to stop protestors entering and scaring customers. Earlier one policeman was seen on the ground after injuring his leg amid the trouble and protestors trying to break through a police barricade sprayed pepper spray at officers.
The protestors, including people campaigning for more social housing and migrants, also threw fruit and other objects at police cordons. Police also set up cordons in the area of President Giorgio Napolitano's residence, although there was calm in this part of town.
There was trouble at a big demonstration by activists demanding better social housing earlier this month, but the full-blown riot that had been feared beforehand did not materialise.