A 2-year-old boy died from complications of E. coli and three other children were sickened in cases that officials said were linked to contact with animals at the San Diego County Fair in June.

Four children, ages 2 to 13, visited the fair from June 8 to 15 and exhibited symptoms of Shiga toxin-producing E. coli from June 10 to 16, the County of San Diego Health and Human Services Agency said in a news release on Friday.

The 2-year-old died on June 24 from complications of the bacteria; the other three children who were sickened were not hospitalized. Their conditions were not immediately available on Sunday.

The fair features more than 2,900 animals and numerous activities, including pig races and livestock shows with calves, rabbits, pigeons and goats. The fair shut public access to animals on Saturday, and on Sunday it began removing them from the fairgrounds.