About 200 protesters are marching along Chicago's Lake Shore Drive toward Wrigley Field to demand more government action against gun violence.
Police shut down parts of the roadway that stretches along Lake Michigan to make way for the demonstration.
Organizers say the anti-violence march before a game between the Cubs and San Diego Padres and the first day of the Lollapalooza music festival is intended to "redistribute the pain." They say they believe the march in the affluent North Side neighborhood will draw attention to violence, corruption and the lack of economic investment in the city's African-American neighborhoods.
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The protesters are also demanding the resignation of police Superintendent Eddie Johnson and Mayor Rahm Emanuel.
Johnson has asserted in recent weeks violent crime in the city has declined, attributing it to new police tactics. However, he conceded more has to be done in the neighborhoods where much of the violence takes place.