A Wal-Mart deli and bakery have been identified as the source of a recent salmonella outbreak in Greenwood, the Indiana State Health Department reported. The salmonella outbreak sickened at least two dozen people in the past two months, reports the Indianapolis Star.

"We believe food handlers who didn’t have any symptoms may have contaminated the deli and bakery products," Lynae Granzow, a health department epidemiologist, said in a news release.

"This is a rare occurrence, and we are confident that Wal-Mart has properly addressed the situation by moving the employees to another part of the store, and cleaning all the equipment and surfaces," said Granzow.

Food available at the store now is safe, but people who bought ready-to-eat items at that Wal-Mart’s deli and bakery areas before Saturday "should discard those items, or return them to the store for a refund," the health department said.