The Iowa Department of Inspections and Appeals and the Department of Public Health are investigating after 20 cases of Salmonella were reported in Iowa County Tuesday.

Officials said Tuesday that early indications show that many of the ill individuals ate potato salad from the Big G Food Store in Marengo.

“Big G’s “Zesty Potato Salad” and “Traditional Potato Salad” have been implicated in several cases of foodborne illness reported in Iowa County. Presumptive test results from the State Hygienic Laboratory at the University of Iowa indicate the presence of Salmonella in these products,” the Iowa Department of Inspections and Appeals said in a news release issued on Monday.

One of the people believed to be infected tells KCRG-TV9 that the salad was widely consumed after a funeral last Thursday. Many of the funeral guests reported becoming ill, the source said.

In an unrelated event, Meijer has announced a recall of various fresh salads and sandwiches because of a potential risk of Salmonella. The “Markets of Meijer Salads and Sandwiches” were sold in Meijer stores from July 20, 2016, to July 25, according to the company’s website. A cooked egg ingredient from Meijer supplier Prime Foods, LLC, tested positive for Salmonella.

No illnesses have been reported.