At least 36 high school students from around the state are reported out sick, including members of the Bothell High cheer team, after a mysterious intestinal illness outbreak spread through Everett’s Comcast Arena on Feb. 4 during the state cheerleading tournament and Salute to Spirit dance/drill competition.

The Washington State Department of Health is working closely with the Snohomish Health District on the investigation. The cause and source of the illnesses, as well as the total number of people sickened, are unknown.

The event had approximately 3,000 attendees and more than 1,000 cheerleading participants from 45 different schools.

“Our immediate concerns are for those who have been affected by this illness and our thoughts are with them,” said WIAA Executive Director Mike Colbrese. “The WIAA appreciates the cooperation of Comcast Arena and of state and local health partners for addressing the entire scope of this situation.”

The investigation is in the early stages, which included the Department of Health (DOH) sending out a questionnaire to participants as well as collecting samples for testing at the state Public Health Laboratories.

Intestinal illnesses can be caused by several viruses and bacteria that may come from a wide variety of sources. Symptoms typically include nausea, vomiting, diarrhea, and may include headaches, stomach cramps, and fever.

People who attended the event and have severe symptoms are advised to contact a health care provider.