A gunman opened fire at a Michigan splash park on Saturday in what the authorities said was a random attack that left at least nine people, including a child, wounded, the police said.

The shooting occurred at Brooklands Plaza Splash Pad in Rochester Hills, Mich., a Detroit suburb, the authorities said.

“It appears to be a random active shooter,” Michael Bouchard, the Oakland County sheriff, said at a news conference.

“It appears like the individual pulled up, exited a vehicle, approached the splash pad, opened fire, reloaded, opened fire, reloaded, left,” he said.

Officials said they had the gunman “contained” inside a nearby home.

The victims were transported to multiple hospitals, but their conditions were unknown, Sheriff Bouchard said. He added that at least one of them was an 8-year-old child.

Rochester Hills is roughly 25 miles north of Detroit and home to about 76,000 people.

Images shared to social media showed a crowd of police and emergency medical workers surrounding a park. Officials could be seen tending to a person on the wet ground of a splash pad — a play area for children fitted with nozzles that spray water — as officers moved bystanders away.