Pakistan suffered a huge power cut early on Monday following a breakdown in its national grid, leaving millions of people without electricity. Power was out in all major centres, including the biggest city, Karachi, and the capital, Islamabad, as well as Lahore and Peshawar. Power minister Khurrum Dastagir said the grid failure followed a "frequency variation" in southern Pakistan. Electricity had still not been restored in many areas as night fell.