In other recent sorcery-related killings, police arrested 29 people in July last year accused of being part of a cannibal cult in Papua New Guinea's jungle interior and charged them with the murders of seven suspected witch doctors.
Kakas could not immediately say what had become of the 29 since their first court appearances last year in the north coast province of Madang.
Police alleged the cult members ate their victims' brains raw and made soup from their penises.
The killers allegedly believed that their victims practiced sorcery and that they had been extorting money as well as demanding sex from poor villagers for their supernatural services.