A police car burns during an anti-G-20 Summit demonstration Saturday, June 26, 2010 in Toronto. Several demonstrations were staged in and around Toronto before and during this week's meeting of leaders from the world's major industrial and economic powers. But on Saturday they turned violent.
Canadian police officers form a line near the fence that had been erected around the G-20 Summit venue in Toronto, Saturday, June 26, 2010.
Activists and protesters march along the streets of downtown Toronto during the G8/G-20 Summits on Friday, June 25, 2010.
Riot police get ready to deploy as activists and protesters march along the streets of downtown Toronto during the G8/G-20 Summits on Friday, June 25, 2010.
Activists and protesters clash with police while marching in the streets of downtown Toronto on Friday, June 25, 2010.
A protester offers a police officer flowers during a street protest in Toronto on Saturday, June 26, 2010. Saturday's protest march, sponsored by labor unions and dubbed family friendly, was the largest demonstration planned during the weekend summits.
A protester sings at riot police while marching along the streets of downtown Toronto during the G-20 Summit on Saturday, June 26, 2010.
Two activists kiss in front of a line of riot police during the G-20 Summit in Toronto Saturday, June 26, 2010.
Activists and protesters heckle riot police while marching along the streets of downtown Toronto during the G-20 Summit on Saturday, June 26, 2010.
Activists and protesters clash with police while marching along the streets of downtown Toronto during the G8/G-20 Summits.
A protester with, gas mask and camera participates in a stand-off with a line of riot police on Bay Street during the G-8 and G-20 Summits, Saturday, June 26, 2010 in Toronto.
An activist breaks a window with a chair in Toronto's financial district on Saturday, June 26, 2010. Black-clad demonstrators broke off from the crowd of peaceful protesters, torching police cruisers and smashing windows with baseball bats and hammers.
Mannequins covered in feces are seen through the smashed windows of an American Apparel store following protests during the G-20 Summit in Toronto Saturday, June 26, 2010.
People look through a window smashed by demonstrators in Toronto, Saturday, June 26, 2010.
Activists attack a police car in Toronto's financial district during the G-20 Summit Saturday, June 26, 2010.
A police car burns after being set on fire by anti-G-20 Summit protesters, in downtown Toronto on Saturday, June 26, 2010.
Police officers surround the scene where anti-G-20 protesters have set police cars on fire in Toronto on Saturday.
A firefighter prepares to extinguish a burning police car after protesters set it on fire during a protest in Toronto on Saturday, June 26, 2010.
Riot police, using tear gas, try to disperse demonstrators at Queens Park in Toronto, Saturday, June 26, 2010.
Police fire pepper-spray at a crowd of activists in front of Queen's Park during the G-20 Summit in Toronto Saturday, June 26, 2010.
Police club an activist in Toronto.
Protesters flee from surging riot police during protests in Queen's Park Saturday, June 26, 2010.
Police club a crowd of activists during the protest at the G-20 Summit in Toronto Saturday.
A bystander is carried away after being pepper-sprayed by police in Toronto, Saturday, June 26, 2010.
A bystander, left, is helped after being pepper-sprayed by police in Toronto, Saturday, June 26, 2010, during demonstrations as the G-20 Summit takes place.
Activists walk through smoke rising from a burning police car in Toronto's financial district during the G-20 Summit Saturday, June 26, 2010.
A police car burns in downtown Toronto Saturday.
The interior of the vandalized CIBC bank building is photographed after activists and protesters damaged windows while marching along the streets of downtown Toronto during the G-20 Summit on Saturday, June 26, 2010.
Demonstrators protesting against the G-20 global economic summit sit in the street during a march in downtown Toronto, Canada, late Saturday, June 26, 2010. More than 400 people were arrested, police said.