If you made the trip to Detroit for the fireworks Monday night, you probably noticed there was no shortage of police officers downtown. Now we know exactly why.

Detroit Curfew Enforcement Leads To Hundreds Of Police Arrests

The Detroit Police Department says officers detained 180 juveniles during the annual fireworks celebration for violating the city's curfew. During the event, according to WWJ, anyone 17 years old or younger had to be accompanied by a parent or guardian between 8 p.m. and 6 a.m.

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Of those detained, police say 171 were Detroit residents, while nine came from outside the city. The department also reported 19 additional arrests tied to other alleged crimes.

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Perhaps most notable is that 12 of those arrests were for carrying a concealed weapon. Police say two of the people arrested on those charges were juveniles. The remaining arrests involved offenses like aggravated assault, resisting and obstructing officers, larceny, and disorderly conduct.

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The fireworks celebration also included a much more serious incident that's still under investigation. According to Detroit Police Chief Todd Bettison, officers were investigating a teenager who reportedly brought a gun to the event in a backpack when another teen took off running, leading to a foot chase.

Officer-Involved Shooting Remains Under Investigation in Michigan

During that incident, an 18-year-old was shot by a member of the department's gang squad. The teen was hospitalized in serious condition but is expected to survive.

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Police have not released additional details about the shooting while investigators continue reviewing the circumstances surrounding the encounter.

Mayor Says Event Was Still A Success

Despite the arrests and the officer-involved shooting, Detroit Mayor Mary Sheffield said she believes the event was largely a success. She credited Detroit police for maintaining order during one of the city's biggest annual gatherings, while acknowledging that large events sometimes attract people looking to cause trouble.

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