Roosevelt Fuller, 19; Errol Bond, 17; and Bruce Manns, 17; were arrested after another teenager, an acquaintance, told police they and a fourth teen beat him Tuesday and stole $120. Also arrested Tuesday was 17-year-old Darrien Spates.
The four were jailed on preliminary charges of robbery and felony mob action, said police Lt. James Chervinko. At a hearing Wednesday, bail was set at $50,000 for Mr. Fuller, $15,000 for Mr. Spates and $12,000 apiece for Mr. Manns and Mr. Bond, who was later released after paying the total.
The 17-year-old who filed the complaint had minor injuries but did not go to a hospital, Lt. Chervinko said.
Mr. Fuller, Mr. Bond, Mr. Manns and three other students were expelled for two years after the stands-clearing brawl at a high school football game one year ago. Another student withdrew from school.
Mr. Jackson used the boys' case as a platform for a national crusade against "zero tolerance" school policies that require expulsion for any form of violence.
A judge permanently banned the protesters from campus in March, agreeing with administrators that demonstrations had disrupted classes.
Lewis Myers Jr., an attorney for Mr. Jackson's Rainbow/PUSH Coalition, said in a statement Wednesday he was "deeply concerned" about the arrests.