More children were apparently sickened by apple puree pouches recently recalled due to dangerous lead contamination, the Food and Drug Administration said.

The agency has received 52 reports of elevated lead levels among children who reportedly consumed the products, which is up from 34 cases reported last week. The reports span 22 states and involve children between the ages of 1 to 4, according to the FDA’s online update on the investigation.

The pouches were marketed to parents and children under three brands: WanaBana apple cinnamon fruit puree and Schnucks and Weis cinnamon applesauce pouches. They were sold by national grocery chains, including Dollar Tree, and online retailers such as Amazon.

The FDA said it is still working with Dollar Tree to get the recalled products off of shelves in several states.