Public health officials say dozens of children became sick at a 4-H camp in central Illinois.

David Remmert of the DeWitt Piatt Bi-County Health Department says about 40 children out of 300 became ill at the camp in Monticello.

Symptoms included vomiting and diarrhea. Remmert says some parents came to pick up their children and took them home. The illnesses started earlier this week.

Public health officials say they’re investigating the outbreak.