VIENNA (AP) — Baby food brand HiPP is recalling some of its baby food jars after samples in Austria, Slovakia and the Czech Republic tested positive for rat poison, officials said Sunday.

Authorities believe the tampering occurred in 190-gram (6.7-ounce) jars of baby food made with carrots and potatoes for 5-month-olds that were sold from SPAR supermarkets in Austria. The first sample tested positive on Saturday.

“This recall is not due to any product or quality defect on our part. The jars left our HiPP facility in perfect condition,” HiPP said in a statement. “The recall is related to a criminal act currently under investigation by the authorities.”

Burgenland Police in Austria said the suspicious products likely have a white sticker with a red circle on the bottom of the jar. Other warning signs include a damaged or opened lid and an unusual or spoiled smell. There also might not be a popping noise when the jar is first opened.

HiPP said it is recalling all of its baby food jars sold at SPAR supermarkets — which include SPAR, EUROSPAR, INTERSPAR and Maximarkt stores — in Austria as a precaution. Customers can get full refunds even without a receipt. Vendors in Slovakia and the Czech Republic have removed all of the brand’s baby jars from sale.

A customer reported that a jar appeared to have been tampered with, police said, though no one had consumed the baby food.

Rat poison typically includes bromadiolone, an anticoagulant that prevents the blood from clotting, according to the Austrian Agency for Health and Food Safety. Ingesting rat poison could lead to bleeding like bleeding gums and nosebleeds, as well as bruising and blood in the stool.

Symptoms could appear two to five days after ingestion, the agency said.