Cadillac police arrested a man Saturday night for setting off a homemade explosive device.
It happened near the city boat launch at 10:15pm when officers heard an explosion just before the fireworks show.
Witnesses pointed officers to the man that threw the explosive.
7&4 News is told no one was injured but the explosion damaged areas in the park, including a curb.
Michigan State Police Bomb Squad responded and removed the explosive.
The man was arrested and was taken to the Wexford County Jail.