KARACHI: A large number of city localities plunged into darkness on Tuesday night as a major fault occurred in the transmission and distribution system of power distributor K-Electric (KE).

According to KE officials, a conductor on the main 220KV transmission line failed, causing the extra high tension line to trip. This caused a ripple effect and units at Bin Qasim power plant tripped in turn, plunging most parts of the city in darkness.