The agency continue to investigate how the WanaBana cinnamon applesauce pouches became contaminated with lead.

The Food and Drug Administration said Tuesday it’s winding down some of its U.S. response to lead-contaminated cinnamon applesauce pouches, which have sickened hundreds of children across the country.

The FDA will continue to actively investigate how WanaBana’s apple cinnamon fruit puree pouches, which were recalled in late October because of high lead levels, became contaminated. However, much of the work the agency has done to ensure no one else buys the applesauce pouches has ended.

The agency has pulled the product from stores and prevented any more of it from being imported into the United States. Two other products made by WanaBana — Schnucks applesauce pouches with cinnamon and Weis cinnamon applesauce — were also recalled and removed from stores.