A crowd gathered and at times grew violent Saturday night in a Milwaukee neighborhood where a police officer shot and killed a man after a traffic stop and foot chase earlier in the day.

Police said the man was armed with a handgun, but Assistant Chief Bill Jessup told the Milwaukee Journal Sentinel that it wasn’t immediately clear whether the man had pointed a gun or fired at the officer. They described the man as a suspect, but didn’t say what led to the traffic stop.

The Journal Sentinel reported that a crowd of more than 100 people gathered in a standoff with 20 to 30 officers, some of whom wore riot gear, several hours after the shooting. Officers got in their cars to leave at one point and some in the crowd started smashing a squad car’s windows. Another police car was set on fire. The newspaper also reported that one of its reporters was shoved to the ground and punched.

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