Pakistan experiences massive blackout, cities including Islamabad, Karachi slip into darkness

Initial reports suggest there was a fault in the Guddu power plant in Sindh province at 11.41 pm, the Energy Ministry tweeted. The fault tripped the high transmission lines and this resulted in the system frequency to drop from 50 to zero in less than a second, causing power plants to shut down, according to the ministry.

source https://zeenews.india.com/world/pakistan-experiences-massive-blackout-cities-including-islamabad-karachi-slip-into-darkness-2335087.html