MIDDLETON, WI (RNN) - A gunman opened fire in an office building, injuring four people in the town of Middleton in Wisconsin on Wednesday. Middleton is a suburb of the state capital Madison.
The suspect died after an exchange of gunfire with police, CNN reports.
One of the victims is in critical condition. Two others are in serious condition. The final victim was only grazed by a bullet, and the wound is not considered life-threatening.
The shooting happened around 10:30 a.m. in a building that houses WTS Paradigm and Esker Inc., the Wisconsin State Journal reports.
The shooter's motive is not yet known. A witness told the State Journal that he was an employee of one of the businesses.
"My heart goes out to the people involved in the shooting," Middleton Mayor Gurdip Brar said. "You never would think this type of thing would happen in your city. Really, so sad that this happened here."