Razor blades were found inside two separate packages of butter inside a New Jersey grocery store, and police are investigating the incidents as possible food tampering.

Two customers reported finding a razor blade inside a stick of Kerrygold-brand butter purchased from the Best Market store in Holmdel, police said.

Best Market says it's pulled all Kerrygold butter from its stores and was having store managers inspect each package for signs of tampering. All the Kerrygold butter from the Holmdel store was turned over to the FDA.

The supermarket chain said in a statement: "Best Market would like to assure its customers that after this thorough review, all items for sale on our shelves are believed to be unaltered."

Anyone who experienced a similar incident is asked to contact police.