A technical fault at the Tarbela power plant early Wednesday resulted in the breakdown of electricity in most of Punjab and Khyber Pakhtunkhwa (KP).
According to the power plant officials, the sudden blackout due to technical difficulties is affecting Lahore, Multan, Bahawalpur along with other cities in Punjab.
The breakdown is also affecting several cities in KP as well, including Peshawar, Swat and Lakki Marwat.
Teams have reached the power plant along with the secretary of the Power Division, with work immediately starting to fix the fault.
No timeline has been given as to when the repairs are expected to finish.
Earlier breakdowns at the power plant had seen the repairs take up to seven to eight hours.
A spokesperson of the Atomic Energy Commission said the tripping of lines from the Tarbela plant caused all four Chashma Nuclear Power Plants to trip as well.
The Power Division spokesperson informed further that the present energy demand of the country is around 20,000 megawatts.
'Industrial load-shedding in Punjab from today'
The spokesperson added that from today, industries in Punjab will also face load-shedding of 10 hours.
Reacting to the move, the All Pakistan Textile Mills Association vowed to protest, saying only Punjab's industries were being denied power for 10 hours a day.
The association said it would meet the finance minister today and then announce its next course of action.