A breakdown in Pakistan's national power grid plunged the country into darkness on Saturday night, officials said.
"A countrywide blackout has been caused by a sudden plunge in the frequency in the power transmission system," Pakistan's Power Minister Omar Ayub Khan said on Twitter.
He said efforts were underway to determine the reasons behind the situation, and asked people across the country to remain calm.


Trump says US, Israel to hold off on fresh Iran attack in hope of quick deal
Israeli strikes kill two in Gaza, destroy medicine storage warehouses
Thirteen die in tourist plane crash over Peru's Nazca Lines
Bomb carried by woman kills three, injures 21 near Moscow restaurant, authorities say
