About 1,000 students were absent at Stafford High School in Virginia on Friday due to flu-like, gastrointestinal symptoms, a spokeswoman with the school system said.
WTOP news partner NBC Washington first reported the absences.
As a result of the unidentified illness, all school activities and athletics have been canceled through Sunday.
A spokeswoman said the Stafford County Public Schools health services team “is working with the local health department to identify the root cause of the illness.”
NBC Washington reported that 2,100 students attend Stafford High School.
The school said it will reassess conditions on Monday and provide additional updates.