The incident happened at about 12:42 a.m. CT, according to the Kenosha County Sheriff's Department.
Kenosha News quotes Sheriff Beth saying, "I'm led to believe there was some type of confrontation inside, the management asked that person to leave and then that person came back a short time later and shot people". Wright said in the updated release that authorities believe there is one "possible unknown shooting victim".
The two people who were injured are in the hospital with serious injuries.
The two people who were shot and wounded were taken to area hospitals.
Travelling from Maharashtra to Delhi will require a negative COVID test report
From April 4 to April 13, Delhi has recorded a total of 77,775 COVID-19 cases, witnessing a massive rise of 234 per cent. The previous highest positivity rate till the third wave, was on November 14 a year ago at 15.33%.
Kenosha County Sheriff's Department spokesman Sgt. David Wright said the suspect is facing a charge of first-degree intentional homicide, with additional criminal charges likely after further investigation. On Thursday, eight people were killed at a FedEx warehouse in Indianapolis when a former employee entered the facility where 100 people were working and opened fire.
It is not clear exactly why that person was removed, or whether there was one or more shooters, the sheriff said.
Wright said investigators have reviewing surveillance video from the scene.
"It was just chaos", he said.
Wisconsin Gov. Tony Evers is praying for the injured and families of the victims as "they grieve and grapple with yet another tragic incident of gun violence", he said in a statement Sunday.