Ferguson protesters leave Chicago's city hall

Dozens of Ferguson police shooting protesters who camped out for hours at the doors of Chicago Mayor Rahm Emanuel's office inside city hall have left the building.

Protester Rose Afriyie says about 100 people who had been in the fifth floor of city hall since Tuesday morning left around 7 p.m. after police warned them they'd be arrested if they stayed. In a statement, the police department says the protesters left voluntarily. Police say no arrests were made.

The protest followed Monday's announcement that a Missouri grand jury had decided not to indict white Ferguson police officer Darren Wilson in the August shooting death of unarmed black 18-year-old Michael Brown.

On Monday night, protesters marched downtown, prompting authorities to close portions of Lake Shore Drive and other streets.