MADISON, Wisconsin - Police are responding to a report of an active shooter at a commercial building in a suburb of Madison, Wisconsin.

The State Journal reports that the Dane County dispatch center said shots have been fired about 10 a.m. at WTS Paradigm in Middleton. 

Police and ambulances have converged on a commercial building where an active shooter has been reported in a suburb of Madison, Wisconsin.

Dane County Sheriff's Department spokeswoman Elise Schaffer confirmed there is an "active shooter situation" and that the office is assisting Middleton Police with the response. She provided no additional information.

A city official says four people have been shot, but none fatally, during a shooting at a software company near Madison, Wisconsin.

City Administrator Mike Davis says the suspected shooter was also injured. Their conditions weren't immediately known.

Davis says police have lifted a lockdown.

A hospital spokesman says four people are being treated at University Hospital in Middleton.

A State Journal reporter at the scene says at least 40 police squad cars and ambulances are outside the building. Police have set up a perimeter around the building.

An employee at a Wisconsin business where a shooting took place says she ran for her life after hearing "really loud" shots.

Judy Lahmers is a business analyst at WTS Paradigm in the Madison suburb of Middleton. She says she didn't know whether to run or hide when she heard shots about 10 a.m. Wednesday. She says she ran out of the building and hid behind a car.

Lahmers says she knows one co-worker was grazed by a shot but was OK. She didn't know the extent of the shooting. Police haven't released details but numerous ambulances are at the scene .

Lahmers says the shooting was "totally unexpected." She said: "We're all software people. We have a good group."

Another company, Esker, is next door. Esker employee Gabe Geib says he heard a couple of shots but didn't immediately know what it was. He says he then saw numerous people running away from the building in "full sprint."

He says he and his colleagues were still huddled in their cafeteria, away from windows, more than an hour after the shooting.