UNIVERSITY PARK — Penn State’s Creamery has voluntarily recalled all of its ice cream and frozen yogurt products manufactured between May 16 and Aug. 11 over concerns that small plastic pieces might be contained in it, according to a university press release today.

Consumers have reported finding small pieces of plastic in the ice cream purchased at the Berkey Creamery beginning in May. One person claimed to have found a penny in a half gallon. That led to a university police criminal investigation beginning in August.

No one has been injured or made ill, according to the university.

The university said it was "erring on the side of caution and safety for the consuming public" in its voluntary recall, according to the release. Consumers who purchased the recalled ice cream can return it for a full refund or exchange.

"The safety of the public is our No. 1 concern," Tom Palchak, Creamery manager, said in the statement. "Although by all accounts these appear to be isolated incidents, they are troubling to say the least.

"We have a long-standing reputation for safety at the Creamery and a product that consumers trust. We are erring on the side of caution with this recall and in taking the actions we are taking to prevent any recurrence."

An independent probe found that the plastic pieces did not get into the products during manufacturing, according to the release.

Additional safeguards have been instituted, which include: Limiting access to production and packaging areas; increased surveillance systems; purchase of an X-ray device and metal detectors; and notification of ingredient suppliers, according to the university.

Tamper-resistent packaging also will be implemented soon.

Consumers with questions are urged to call the Creamery at (855) 677-0464.