Millions of people in Cuba are without power after a failure of the nation’s electric grid left the island 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. “At around 8:15 p.m. tonight, a failure at the Diezmero substation caused a significant loss of generation in the west of #Cuba and with it the failure of the National Electric System,

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 suffered a massive power outage Friday night affecting Havana and the country's provinces that left millions in the dark.

Cuba has struggled with blackouts in recent months, including a nationwide one in December. Friday’s power failure was the fourth widespread one in five months. Government officials blame U.S. economic sanctions for the ongoing crisis, while others point to aging infrastructure, fuel shortages and the island’s susceptibility to hurricanes.

Havana’s streets plunged into darkness once again as a general blackout hit Cuba. Writing on the social network X, Cuban PM Manuel Marrero Cruz said the government was "working tirelessly" to restore power.

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.