NYPD officials say at least 20 people were arrested in connection to the protests in Times Square.
They say two commercial fireworks were thrown from a car near Midtown.
One person suffered a minor burn in the incident.
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An arson investigation is being led by Midtown North.
This comes as Israel and Hamas announced a cease-fire Thursday, ending a bruising 11-day war that caused widespread destruction in the Gaza Strip and brought life in much of Israel to a standstill.
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