An employee at an Aqlifoods Co. factory at the center of a food-poisoning scandal was arrested in Gunma Prefecture on Saturday for allegedly obstructing the firm's business by tainting frozen food with pesticide.

The man was identified as contract worker Toshiki Abe, 49, of Oizumi, Gunma. He was taken into custody in Saitama Prefecture on Friday and interrogated Saturday morning, sources said.

Abe denied the charge and was quoted by police as saying he "doesn't remember."