Police have questioned two former executives of Nippon Meat Packers Inc. over a scandal involving the false labeling of beef at its wholly owned subsidiary, Nippon Food Inc., sources said Friday.

The executives are Heihachiro Azuma, 70, a former vice president, and Motoaki Shoji, 65, a former managing director, the sources said.

They said the voluntary questioning was part of the police investigation into the fraud case, in which the subsidiary was found to have passed off imported beef as domestic to receive government subsidies

The police asked the two about the involvement of the parent company, the sources said.

Azuma and Shoji resigned in August to take responsibility for the fraud.