NBC Philadelphia: One teen is hospitalized and more than a dozen others are in jail after a flash mob turned violent in Center City.
As many as 100 teens from three area high schools descended upon The Gallery at Market East Tuesday afternoon, police say.
Security quickly tossed them from the underground mall at 12th and Market Streets when the crowd became rowdy and that’s when the situation took a turn for the worse.
Groups made their way up Market Street towards City Hall — some starting a large snowball fight on the building’s grounds while others began fighting on street corners, police said.
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