Protesters threw turquoise and red paint at the riot officers. Some led the crowd in chanting, "This is why we call you pigs."
Others pleaded with agitators to be peaceful and return to the march; some protesters tried to fight with police and were clubbed and kicked in return.
Interim Oakland police chief Howard Jordan said his officers had no choice but to respond with tear gas. The crowd at its peak grew to more than 1,000 at about 8:30 p.m., and two officers were wounded from the paint and chemicals thrown at them.
"We felt that the deployment of the gas was necessary to protect our officers," he said at a news conference.
Although police did not provide a number of arrests in Tuesday night's demonstration, he said five people involved with the Occupy movement had been arrested earlier, after the morning raid.
Some protesters who avoided conflict and wanted to show their support for the Occupy Wall Street movement were displeased by the violent turns.
"They didn't have to force police into that situation," said Helen Walker, 46, a nurse from Albany. "It was totally provoked, and if I could have, I would have stopped those idiots from throwing paint."Read more:
http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2011/10/25/BAUB1LLTC9.DTL#ixzz1bzouVIc8 
