He didn't release details about the suspect or how the attack unfolded.
Police are planning an update later Wednesday afternoon.
The building is home to Esker Software and WTS Paradigm, but there is no confirmation on who the attacker is and how they are associated with the building.
At least four people were wounded - none fatally - during a shooting at an office building in a suburb of Madison, Wisconsin on Wednesday.
Madison College on nearby shooting incident: "There is no active threat on campus at this time". He has been described as being in "critical condition". A fourth victim is being treated at St. Mary's Hospital with non-life threatening injuries.
The outlet spoke to local police, who confirmed that they had responded to a building in Middletown, Wisconsin, not far from Madison.
Middletown Mayor Gurdip Brar was reportedly in a staff meeting with the police chief at the time of the shooting.
'It appears the situation is stable now, ' City Administrator Mike Davis told the Journal News, adding 'The bad news is that there were four injured by the suspect'. Their conditions were not immediately disclosed by cops.
WTS Paradigm makes software for the building products industry. She says she didn't know whether to run or hide when she heard shots about 10 a.m. Wednesday. Police activity centered on WTS Paradigm in Middleton.
Lahmers told the Associated Press she ran out of the building and hid behind a vehicle. "You just wonder, do you hide or do you run?" One of the station's anchors says an employee saw a co-worker open fire, hitting multiple people. She didn't know the extent of the shooting. He said officers were still conducting interviews after witnesses and others at the scene were taken in school buses to a nearby hotel. She didn't have any other information about the shooting but said it was "totally unexpected".