Over 80 attendees that ate the oysters at the Dec. 3 event reported illnesses and gastrointestinal symptoms like diarrhea, nausea and vomiting.

The county Health Department said that the outbreak at the 101 Best Restaurants event was linked to a broader outbreak from oysters that have since been recalled.

Los Angeles health officials are investigating a norovirus outbreak after around 80 people were sickened after eating raw oysters at an event to showcase the city’s best restaurants.