In a 48-hour period, almost 20 percent of the student body at Kaneland High School in Maple Park became ill, according to a press release Thursday from the Kaneland Community Unit School District No. 302’s superintendent of schools. .

“District officials and staff from the Kane County Health Department are investigating several possible sources of this illness,” the press release said. “There is not an obvious pattern that would implicate water or food at this time.”

The administration called off after-school events and practices on Thursday and also canceled classes and activities today. The elementary and middle schools will proceed with their normal schedules today, according to the release.