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A suspected gunman has been apprehended after an "active shooter incident" at a local manufacturing facility in Aurora, Illinois, according to city officials .
"We have an ongoing active shooter incident at 641 Archer Av. This is an ongoing active scene," the police department tweeted just before 3 p.m. local time.
Four police officers and multiple civilians were injured in the shooting, The Daily Herald reported . Their conditions are unclear, and authorities have not indicated if any are dead.
Federal authorities from the Bureau of Alcohol, Tobacco, Firearms and Explosives were also en route to the scene, the bureau tweeted . Local newscasts showed a massive police presence on the scene, with firemen, police, and SWAT responding.
One witness who works at the plant, John Probst, told ABC 7 Chicago that the shooter was one of his colleagues.
"As soon as we heard shots, we took off out the front door," he said.
This is a developing story. Check back for updates.
