One child ingested the THC candy, "became ill and sought immediate medical attention" after the event at Earhart Elementary School, Alameda police said Monday.
The district said that two families found the weed candies among the sweet treats the kids got at the PTA event. The candies were labeled as Lost Farm Cannabis-Infused Fruit Chews and resemble Starburst in shape and size.
"We urge all families to sort through their child's candy generally this week," Susan Davis, the senior manager for community affairs said in a warning to parents. "Please know that we are working quickly to determine the source of this candy and if other children received it."
The police department said that it is investigating the incident.