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Tree-sitters on Friday morning set up camp in a sycamore outside Oakland City Hall. (Jane Tyska/Staff)

OAKLAND -- Fourteen people were arrested Friday in separate confrontations with Occupy Oakland protesters on different sides of Frank H. Ogawa Plaza.

The latest scuffle started about 2 p.m. near 15th Street and San Pablo Avenue after police had given about 75 protesters a deadline to remove excess cooking and sleeping gear.

The protesters objected, and 10 people were arrested on charges ranging from trying to free an arrested protester to battery on officers including spitting, punching, shoving and, in one incident, hitting a police officer with a metal chair.

About 12:15 p.m., police made four arrests at the base of a sycamore tree holding a tree-sitters' platform on the 14th Street side of the plaza. Police said the protesters were taken into custody because they were trying to access the tree.

About a dozen protesters were at the plaza when a matching number of officers showed up to make the arrests shortly after noon. No injuries were reported, and one protester remains in the tree.

The platform was erected overnight in the tree outside Oakland City Hall with a sign that reads "Free the Land."

Siaosi Aleamouta, of Oakland, said he spent the night in the tree to re-establish Occupy's presence at the plaza.

"Occupy Oakland is not dead," he said. "They cannot destroy our hearts or our minds."

It has been more than two weeks since public works crews removed a platform and gear from another tree at the plaza.

The previous tree-sitters had stayed for about a month, in support of Occupy Oakland protesters. Police at the time said the structure was deemed to be illegal lodging, and that human waste had been found under the tree.