Walmart, Wegmans and Albertsons stores have recalled cucumbers for possible contamination with salmonella. They were sold in more than half of states.

The FDA said SunFed Produce is recalling all sizes of whole fresh American cucumbers sold between Oct. 12 and Nov. 26 because they may be contaminated with salmonella.

At least 68 people have fallen ill in the outbreak believed to be linked to cucumbers sold in the United States and Canada, the Centers for Disease Control and Prevention said.