Police are investigating the suspected deliberate contamination of a number of snack food packets, believed to be potato chips, at a Melbourne supermarket last week.

A police spokeswoman confirmed officers were working with the Department of Health and the manufacturer to determine whether the contamination was deliberate.

A caller to 3AW’s rumor file today claimed that pins, needles and paper clips were found inside three packets of chips in the supermarket.

The police spokeswoman could not confirm the location of the supermarket or any further details about the investigation, however said the "safety of consumers is paramount."

No public health warning has been issued.