Around 15 police officers had to be taken to a hospital emergency room after a home-made bomb exploded during clashes with student protesters in Turin on Friday.
The bomb was reportedly thrown at the police in the city's Piazza Castello, outside the office of the prefecture, and gave off fumes after exploding.
Clashes broke out when some of the young people were repelled after trying to break through a security cordon and reach the door of the Prefecture building.
Students also hit police vehicles with flagpoles outside the offices of State broadcaster Rai in the city, causing some damage to them.
Protesters stripped the Italian flag from the entrance to the northern city's famous cinema museum and put up the Palestinian one in its place.
Students are marching in many Italian cities on Friday to protest against Premier Giorgia Meloni's government, in particular its education policies, and against arms sales to Israel and in support of the Palestinian people.
A photo of Meloni splashed with blood-red paint was on display at the Milan demo.
'No Meloni Day' and 'Let's Free the Country' were among the slogans on banners at the Rome march.
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