A gunman opened fire at the Henry Pratt Company, a valve manufacturer in suburban Chicago on Friday, killing five people and wounding at least five police officers before he was fatally shot, police said. >> Read more trending news Officers arrived within four minutes of receiving reports of a shooting and were fired upon as soon as they entered the 29,000-square-foot manufacturing warehouse, Aurora, Police Chief Kristen Ziman said in a news conference. Update 6:45 p.m. EST Feb. 15: The chief of police says five people were killed and five officers were wounded in a shooting at a business in suburban Chicago. Aurora Police Chief, Kristen Ziman, identified the gunman as 45-year-old Gary Martin. Ziman says the gunman was also killed. The five police officers that were injured in the shooting are in stable condition according to the Chicago Sun-Times. Update 5:15 p.m. EST Feb. 15: A spokesman for the coroner’s office says at least one person is dead following a shooting at a business in suburban Chicago. Kane County coroner’s office spokesman Chris Nelson says at least one person was killed in the attack Friday afternoon at the Henry Pratt Co. building in Aurora. Update 4:45 p.m. EST Feb. 15: A city spokesman told WGN that at least four police officers were injured. Police have not said if anyone else has been injured. Update 4:15 p.m. EST Feb. 15: Initial reports indicate that the shooter has been apprehended, but the area is still on lockdown. Update 3:55 p.m. EST Feb. 15: A man who said he witnessed Friday’s shooting told WLS-TV that he recognized the person who opened fire at the Henry Pratt Company. The man told WLS-TV that the shooter was one of his co-workers. Update 3:50 p.m. EST Feb. 15: Police confirmed they are continue to respond Friday afternoon to an active shooting reported in Aurora. Update 3:45 p.m. EST Feb. 15: Citing preliminary reports from the scene, the Daily Herald reported several people were injured in the ongoing active shooter situation reported Friday afternoon in Aurora. Police did not immediately confirm the report. Update 3:40 p.m. EST Feb. 15: Authorities with the Bureau of Alcohol, Tobacco, Firearms and Explosives are responding to the reported shooting, officials said. Check back for updates to this developing story.