Kansas health officials are investigating an outbreak of gastrointestinal illness among patrons of a Garden City restaurant.

The state and Finney County health departments said more than 110 cases of the illness were reported as of Friday among people who ate food from a Jimmy John’s Gourmet Sandwiches restaurant.

Authorities are asking anyone who ate food from the Garden City Jimmy John’s between Dec. 10 and Dec. 24 to complete a survey, even if they did not get sick.

The Kansas Department of Health and Environment says officials believe the outbreak was caused by norovirus. The symptoms include diarrhea, vomiting, nausea and muscle aches.

The restaurant is working with health officials on the investigation. The Finney County Health Department has said there were no violations of food-handling rules.