A salmonella outbreak that has sickened at least 11 people has been linked to a brand of organic nut butters, according to the Centers of Disease Control and Prevention.

ABC News reports that JEM Raw Chocolate LLC has been linked to the outbreak, and are under investigation by health officials. The company issued a press release, that has since been shared by the Food and Drug Administration’s website. In the statement, the company says, “JEM Raw has initiated a voluntary recall of all products and sizes, packaged in glass jars, and sold under the brand name JEM Raw Organics.”

According to JEM Raw, none of their products have tested positive for salmonella contamination, but the company is working with the FDA to figure out what ingredients are tied to the outbreak.

Six of the eight people sickened by the outbreak reported contact with a variation of JEM Raw nut butter no more than a week before experiencing symptoms. The ages of the afflicted ranged from infants to the elderly, with illnesses reported between July 18 and Oct. 15. No hospitalizations or deaths have occurred as a result of the outbreak.

Experts say that children and the elderly are at the highest risk of infection. According to the CDC, the most common symptoms of a salmonella infection are abdominal cramps, diarrhea, and fever.

The CDC recommends that recalled peanut butter be disposed of, even if it has been previously consumed without illness.