A man suspected of contaminating open food bars at three Ann Arbor, Mich. grocery stores including Whole Foods Market, was taken into custody Tuesday, after authorities received tips from the public. The suspect allegedly sprayed a combination of hand cleaner, water, and Tomcat mice poison on produce in Whole Foods, Meijer, and Plum Market in Ann Arbor over the past two weeks—though authorities are trying to determine if the suspect targeted any other grocery stores. “Investigators are currently coordinating with state of Michigan and Washtenaw County Health Officials to determine the extent of any contamination and the threat to the public,” the FBI’s Detroit team wrote in a statement.