LEWISTON — A Lewiston man says he’s considering legal action after finding a knife in the store-bought cake he bought for his son’s second birthday party.

Nathan Bibeau says as the family was slicing into the Elmo birthday cake bought at the Auburn Walmart when someone spotted a small metal paring knife.

Bibeau tells WGME-TV he was “pretty disappointed,” and called Walmart immediately.

Walmart apologized and offered a refund. A corporate spokeswoman said the knife incident “should not have happened,” and the retailer was eliminating use of the knives at store bakeries nationwide.

Bibeau says the damage was done. His son’s birthday party was ruined.

He says he has talked to a lawyer, but says the incident will not stop him from shopping at Walmart.