Thirty-five people reported symptoms of vomiting and diarrhea after sharing a buffet line at the Pyle Center at the University of Wisconsin in Madison.

A spokeswoman for UW Extension, which runs the conference center, told the Wisconsin State Journal they fell ill a day after eating lunch Thursday in the Pyle Center’s Alumni Lounge. She says the same food was served to four other groups at the center, as well as to employees and visitors in the nearby Lowell Center, and no one from those locations reported symptoms.