Maruha Nichiro Holdings announced a recall of around 6.3 million products produced at a facility in northwest Japan. The recall was initiated after frozen pizzas emitting a motor oil-like smell were found to contain malathion, an insecticidal pesticide used in agriculture. The firm says 88 different products are being recalled.

"We're making an all-out effort to investigate, but are still unable to specify the cause at this moment," the company says in a statement. The local health authority and police are investigating, but have not found evidence of the chemical in the manufacturing facility, according to a press release from financial watch site www.4-traders.com.