The Centers for Disease Control and Prevention says it believes a multi-state E. coli outbreak is linked to fast food restaurant chain Jimmy John’s.

Fourteen people in Texas, Missouri, Illinois, Utah and Iowa have become ill after eating clover sprouts from the chain. The agency considers raw and lightly cooked sprouts as sources of foodborne illness.

The company says it is no longer serving the sprouts.

No hospitalizations or deaths have been reported in the outbreak.

Health officials say anyone who ate the sprouts before Monday should report any gastrointestinal upset to a doctor.

The news comes a day after the FDA sent a warning letter to the chain, blaming it for multiple outbreaks over the last seven years. The letter says the restaurant has not fixed its supply chain to assure the safety of the ingredients it uses.