Millions of people in Cuba remained without power Saturday after a failure of the nation’s electric grid left the island in the dark the previous night.

The grid failed on Friday evening about 8:15pm (00:15 GMT) after a breakdown at Diezmero substation in the capital, Havana, kicked off a chain reaction that shut down power generation across the island, according to officials at operator Union Electrica (UNE).

Cuba‘s electric grid collapsed late Friday leading to a nationwide power outage and leaving millions in the dark. At around 8:15 p.m., an outage at the Diezmero substation in Havana caused “a significant loss of generation in western Cuba and,

Cuba has suffered a massive power outage affecting Havana and the country’s provinces that has left millions in the dark.

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

Millions of people in Cuba remained without power Saturday after a failure of the nation’s electric grid left the island in the dark the previous night.