CHICAGO (CBS) — Between 300 and 500 Occupy Chicago demonstrators walked out of area colleges Wednesday and marched on Chicago City Hall and the James R. Thompson Center.

Protester Kelvin Ho said the march was a show of support for counterparts in Oakland, Cal. Clashes between police and protesters in Oakland left a 24-year-old Marine veteran critically injured.

The protesters said they also had messages to deliver to Mayor Rahm Emanuel and Gov. Pat Quinn. The protesters are unhappy with restrictions placed on their protests, both on public and on private property.

LISTEN: WBBM Newsradio’s Bob Roberts reports

The round-the-clock sit-in continues at the corner of LaSalle Street and Jackson Boulevard.

The protesters will begin their day early Thursday, with pickets expected to be erected around the Union League Club by 7 a.m. to protest the appearance of Wisconsin Gov. Scott Walker.

Ho said that Walker “personifies” what the Occupy movement opposes.