With outstanding dues spiralling to nearly Rs 6,000 crore, state-owned power generation company NTPC has threatened to cut supplies to the electricity distribution companies of Andhra Pradesh, Karnataka and Telangana from Wednesday if the bills are not cleared soon. The cumulative dues, pending for more than 60 days, stood at Rs 4,138 crore as on January 30. If immediate arrangements are not made, the three states could lose 3,470 MW of power supply from NTPC’s Ramagundam, Simhadri, Talcher and Kudgi power plants.