Cuba has faced fuel, food and other shortages amid its worst economic crisis in decades. Photo: AP PHOTO

Communist Cuba's power grid has collapsed for the fourth time in less than a year, causing a country-wide blackout, authorities say.

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"There has been a total disconnection of the Electric System," the Energy Ministry and National Electric Union said.

The grid operator said the grid collapsed at 9.14am on the Caribbean island.

The ministry said causes are being investigated and the restoration process has already begun.

Even before Wednesday's grid collapse, leaving 10 million r

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