Boston’s Fox 25 News reports that Massachusetts state and federal health officials are looking into cases of salmonella that have been reported in multiple states.

The Massachusetts Department of Health confirmed on Thursday afternoon that the agency, along with the Centers for Disease Control and Food and Drug Administration, are investigating a potential multi-state salmonella cluster.”

The CDC defines a cluster as a “larger number of people than expected appear to have the same illness in a given time period and area.”

Although the investigation is underway, as of Thursday none of the cases have been tied directly to one source, according to the Mass.DPH No cases have been directly tied to a source at this time.