A suspect has been arrested after at least one person was killed and four police officers wounded during a shooting in an industrial park near Chicago.
Clayton Muhammad, the director of communications for the city of Aurora, said the officers are in a stable condition following the shooting at the Henry Pratt building on Friday afternoon.
Witness John Probst said that he ran out of the back door of the building as the shooting unfolded.
He said he recognised the gunman, who had “a pistol with a laser”, as someone who works at the company.
He said he was not hurt but that another colleague was “bleeding pretty bad”.
The company makes valves for portable water, waste water, power generation and industrial purposes.
West Aurora School District 129 said on its website that it was keeping all students in their classrooms as police investigate but that “teaching will continue with reduced movement”.
Aurora is city of about 200,000 people about 38 miles west of Chicago.