Khyber Pakhtunkhwa (KP) Food Safety and the Halal Food Authority sealed four units due to substandard production of food items and arrested four people, on Sunday. According to details, the KP Food Authority checked the quality and standard of the food items manufactured in production units at Hayatabad Industrial Estate, Peshawar. The authority seized a huge quantity of substandard raw material including unhygienic meat and sealed four units along with arresting four people.