Mounties have launched an investigation into a claim made online that a razor blade was found in a carton of Island Farms milk on the weekend.

In a now-deleted Facebook post, the woman said she found the piece of metal Sunday night in a two-litre carton of Island Farms two per cent milk bought at the Real Canadian Superstore in Duncan.

"I called the Duncan Superstore, they have removed any milk deemed suspicious," she said in the post. "Island Farms did return my call and made plans to pick up the evidence but they have not indicated any intent to inform the public."

North Cowichan/Duncan RCMP confirmed it received a report about the extraneous material on Tuesday and was investigating the matter.

The milk producer's parent company, Agropur, confirmed Tuesday it had been in contact with the complainant.

An Agropur spokeswoman told CTV News the company has been investigating the claim, which it called an isolated event.

"Given the nature of the tamper-proof packaging, and after detailed investigation, it is extremely unlikely that any foreign material could have entered the product while it was in our plant," Agropur said in a statement.

Loblaw, which owns Real Canadian Superstore, also issued a statement saying it was in contact with the complainant and that it was unlikely the material entered the product in its supply chain.

"We are in contact with the vendor and the CFIA and are assisting with their investigation," Loblaw said in a statement.

The claim comes two months after RCMP wrapped up a months-long investigation into similar complaints that foreign material wound up in Agropur milk products.

Investigators were searching for any proof that milk products were tampered with, but wrapped up the case saying it wasn't clear how the objects came to be inside milk jugs and there was no evidence of criminality.

The incident also prompted the CFIA to issue a massive recall of several Agropur four-litre milk jug products. Island Farms added new safety seals to its milk products as a result.