Protesters angered over the proposed budget cuts in Toronto's 2012 budget launched an angry demonstrations at City Hall on Tuesday.
Four men were arrested during the protest — which continued overnight and into Wednesday morning.
It began at 5:30 p.m. when several hundred people gathered in Nathan Phillips Square.
The four who were arrested are facing charges of obstructing of an officer, unlawful assembly and mischief.
Three were released on Tuesday night. The fourth was held in custody and was scheduled to appear in court on Wednesday.
Police said all of the men are in their 20s.
They were part of a group of demonstrators who tried to get into City Hall and were met by a police line.
One woman tried to force her way in, but was dragged away by police.
Nele Michiles, was in the crowd.
"There's been some people pepper sprayed," she said. "One of the girls who was pepper sprayed is in the hospital right now."
Nick Williams was one of those who was sprayed. He said he was taking pictures of the arrest at the time.
"Our friendly Toronto EMTs helped me out with some saline. I'm disgusted by the behaviour of police tonight," he said.
Other demonstrators were taken away in handcuffs.
Three men with bloodied faces were held and questioned outside City Hall.
Katia Berdichevsky, a teacher who came out to protest, was surprised by the number of police.
"There are well over 100 police officers on duty supposedly getting paid ... to protect citizens from themselves."
Members of the Occupy Toronto movement set up tents in the square, then moved them to another site nearby early Wednesday morning.