Cuba’s power grid collapsed Friday night, triggering a nationwide power outage and plunging its more than 10 million people into darkness.

The nation's Electrical Union, which regulates the power sector, reported that 42% of the national energy system would be off. Cuba suffered three disconnections of its national energy system at the end of last year in October,

Cuba's national electrical grid collapsed late on Friday, the country's Energy and Mines ministry said, leading to widespread blackouts in the capital Havana and across the Caribbean island nation. Energy ministry officials said an electrical substation in Havana failed around 8:15 p.