Source: ABC News (Associated Press)

Chobani is pulling some of its Greek yogurt from supermarket shelves after hearing of "swelling or bloating" in cups.

The company said it has investigated and found a type of mold commonly found in dairy that may be to blame.

Chobani said the affected product came from its Idaho facility and represents less than 5 percent of its total production. The company has been working with retailers to remove and replace containers with the code 16-012 and expiration dates from Sept. 11 to Oct. 7.

Chobani, which is based in New Berlin, NY, did not say how many of its cups or what varieties were affected. The effort is voluntary and the company is not issuing a formal recall.

A representative for Kroger, the nation's largest traditional supermarket operator, said Chobani issued a product withdrawal Friday. "It was not a food safety issue," Kroger spokesman Keith Dailey said in an email.

On Tuesday, Chobani was responding to people who were complaining about their yogurt cups on Twitter. One person described her cup as "unnervingly fizzy," another said the cups were like "yogurt soup" and another said it tasted like "wine."

Yet another person said the strawberry flavor they bought tasted "really old."

Chobani says customers with the affected code dates should contact its customer service team at care@chobani.com to get replacement products.