Blue Bell Creameries is working with police to find a woman who licked the inside of an ice cream tub and then put it back in the store's freezer.
The video, which was posted on social media, has been viewed more than 10 million times.
It's not known when or where the incident took place.
"We take this issue very seriously and are currently working with law enforcement, retail partners and social media platforms," Blue Bell said. "This type of incident will not be tolerated."
In a statement posted on the homepage of its website, Blue Bell says concerned customers should easily notice tampering because their lids are frozen tightly to the carton.
We want to thank our consumers for alerting us to the incident this past weekend of a video posted to social media showing a Blue Bell item being tampered with. We take this issue very seriously and are currently working with law enforcement, retail partners and social media platforms. This type of incident will not be tolerated.
Food safety is a top priority, and we work hard to provide a safe product and maintain the highest level of confidence from our consumers.
During production, our half gallons are flipped upside down and sent to a hardening room where the ice cream freezes to the lid creating a natural seal. The lids are frozen tightly to the carton. Any attempt at opening the product should be noticeable.
We will continue to monitor this situation.