The boy, 17, surnamed Fan, with the help of another friend, knocked his father unconscious with a blow to the head, and then severed his father's left hand at the wrist as well as the right arm at the elbow using a watermelon knife, officers were cited as saying.

According to officers, Fan wanted to get even with his father, who Fan had recently gotten into a fight with. The boy, disgruntled by his father's strict discipline at home and history of abusing Fan's mother, had been living with his father since his parents' divorce, said a Central News Agency (CAN) report.