The agency is working with Dollar Tree to ensure an effective recall, it said, weeks after the regulator first issued a safety alert on the purchase of WanaBana pouches following reports of four children with elevated blood lead levels. In response to the FDA's Wednesday announcement, Dollar Tree said it had already instructed stores to remove the product from shelves and that they no longer sell that flavor on its website. The product was available nationally through multiple retailers including Amazon, Dollar Tree and other online outlets, the FDA said.