Cuba's National Electric Grid Collapses

On Monday, Cuba's national electric grid collapsed, the country's grid operator said, leaving around 10 million people without power amid a U.S.-imposed oil blockade that has crippled the island's already obsolete generation system.

Grid operator UNE said on social media it is investigating the causes of the blackout, the latest in a series of widespread outages that last for hours or days and that this weekend sparked a rare violent protest in the communist-run ​country.

Officials ruled out a major power plant failure, but had still not pinpointed the root cause of the grid ​collapse, suggesting a problem with transmission.

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