Hundreds of students were involved and police in riot gear had to be called in.
Police in riot gear responded with "blast ball" grenades that release smoke laced with pepper spray.
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Dozens of people were arrested after police in riot gear were deployed ahead of a football match in Nuneaton.
Police in riot gear then moved into the park, evicting hundreds of protesters.
They ensure television crews are around to cover confrontations between police in riot gear and impoverished Indians in traditional dress.
What the world is seeing is Toronto as an armed camp with a fenced-off no-go zone and hundreds of police in riot gear.
"That's my building, " she said, pointing to an office block surrounded by a line of a mounted police and another line of police in riot gear.
Police in riot gear charged the youths, pushing them back on to the Place de l'Opera where the crowds were gathering, but the situation remained volatile.
On Wednesday, protesters faced off against police in downtown Cairo, with police clad in riot gear chasing demonstrators into alleys.
About 300 to 350 demonstrators threw rocks and charged a line of about 200 police clad in riot gear.
The protest led to 25 activists being arrested for trespassing (they were later released), while police officers in riot gear guarded the hotel entrance.
TEHRAN, Iran (CNN) -- Iranian police clad in riot gear dispersed a crowd of demonstrators at the University of Shiraz Saturday by beating them with batons, a video uploaded to Facebook showed.
Another showed that the unrest had spread beyond the capital -- police clad in riot gear dispersing a crowd at a university in the southern city of Shiraz, beating screaming women with their batons.
CNN: Chaos prevails as protesters, police clash in Iranian capital
They targeted about 30 armored police vehicles and as many as 100 police officers clad in riot gear.
But the police - in full riot gear - do not agree and are ringing the metal barriers that are blocking off the park.
At intervals along the barricaded roads stood phalanxes of police and more militia in riot gear, including batons and shields.
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Scores of police and state troopers, some in riot gear, tried to clear the streets, and some officers used pepper spray to disperse demonstrators.
There were security frogmen on boats in the Seine, there were helicopters whirring overhead, and the streets were lined with hundreds of police vans, in body armor and with riot shields and other riot gear.
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