06/03/2015 02:49 EDT | Updated 06/02/2016 05:59 EDT

Check infant formula for signs of product tampering or substitution: CFIA

OTTAWA - The Canadian Food Inspection Agency is advising people using baby formula to check the packaging for signs of tampering or product substitution.

The agency says it has become aware of reports of product substitution or tampering in infant formula products.

It says the problem has turned up when someone returns altered products for a refund, and not normally during the manufacturing process.

The CFIA says there have been no illnesses associated with the complaints.

It says anyone using infant formulas should make sure the security seal is intact and has not been altered or the product substituted.

The agency says infant formula that appears to have been altered should not be used.