By CBS 2 Chicago Staff

CHICAGO (CBS) — Police on Sunday were hoping for a quieter night in the Loop, after a tense one the night before.

There were lots of sirens and police lights after officers were called to disperse crowds of young people Saturday night – breaking up what police called “disturbances.”

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Police would only say officers were responding to a large group of people at Millennium Park around 7 p.m. Saturday.

It appeared officers forced the group to leave, and they made their way to State Street, where they gathered on several corners, and near the ‘L’ station at Wabash and Randolph.

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Police on bikes blocked the street to contain the crowds.

A CBS 2 camera crew spotted one teen who appeared to throw a rock at a police car. We also found several garbage cans that had been knocked over.

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Police said there were no incidents of looting or violence.

CBS 2 Chicago Staff