Two children, including an 8-year-old, were among several injured when a gunman opened fire at a children's water park in US' Michigan on Saturday evening. 

The shooter, who had been hiding inside a near by home, was surrounded by the police, Oakland County Sheriff Michael Bouchard said. The injured were rushed to hospital.

"We had an active shooter at the splash pad on Auburn in Rochester Hills. That is still an active crime scene and we potentially have the suspect contained nearby, but we asked for the moment people stay away from the area. We have numerous wounded victims. More to follow," the police department said in a post on X.

The Oakland County Sheriff said that the suspect reached the splash pad around 5 pm on Saturday and opened fire after he got down from his vehicle.

The suspect reloaded his gun several times as he fired as many as 28 times, the sheriff said.

While the motive behind the shooting is not known yet, police suspect that the attack was a random one.