Three people are dead, including a suspect, and another has been seriously injured in a casino shooting near Green Bay, Wisconsin on Saturday, local media reported.

Investigators believe the suspect was targeting a specific person he was angry at, but the person wasn't at the casino at the time, AP reported citing Brown County Sheriff's Lt. Kevin Pawlak.

The shooter instead shot some of the targeted person's friends or co-workers, Pawlak said.

Earlier reports said at least seven people were shot at the casino.