After an E. coli outbreak that sickened at least three children, St. Helena Little League will no longer serve hamburgers at concession stands during games.

The Napa Valley Register reported that Jim Gamble, president of St. Helena Little League, said the organization’s snack shacks now serve only pre-packaged and pre-cooked food. "The resolution was passed in early April. … (The children’s infection) was an isolated incident and we received contaminated beef. Unfortunately, these children got sick from it. We’re all very grateful they’ve fully recovered. It was scary."

Gamble said the three confirmed reports of E. coli were in children between the ages of 8 and 12.