KARACHI: A major power outage hit the city on Saturday as the national grid’s transmission line tripped. K-Electric took to the Twitter and said, “Supply to the city is affected following tripping in the transmission line of the national grid. The sudden disruption in supply has had a rollover effect on local circuits serving Karachi.” (1/2) Power Supply Update Supply to city is affected following tripping in transmission line of National Grid. The sudden disruption in supply has had a rollover effect on local circuits serving Karachi. — KE (@KElectricPk) October 20, 2018 Also read Karachi’s electricity woes In another Tweet, the power utility added, “Restoration efforts are underway. We regret the inconvenience caused to customers and request their cooperation during this time.” (2/2) Restoration efforts are underway. We regret inconvenience caused to customers and request their cooperation during this time. — KE (@KElectricPk) October 20, 2018 The supply of power to grid stations located in North Karachi, Nazimabad, North Nazimabad, and Surjani Town has been affected due to the tripping in the transmission line. Also read Murad urges PM to resolves Karachi’s electricity woes Moreover, many parts of the metropolis, including Defence, Buffer Zone, Gulshan-e-Iqbal, Gulistan-e-Johar, North Nazimabad, New Karachi and Surjani Town, are suffering electricity outage for the past few hours. Nusrat Bhutto Colony, PIB Colony, Quaidabad and Yousuf Goth have also been affected.