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.


Syria sentences absent Bashar al-Assad to death
South Africa mine dump collapse kills 14 suspected illegal miners
Ebola deaths surpass 2,000 in Democratic Republic of Congo
Colombia rescue efforts press on after quake, death toll expected to rise
Trump demands Iranian reparations as peace deal discussions continue
