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 massive blackout is the fourth in the last six months as a severe economic crisis plagues the Caribbean country.

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

Cuba’s national power grid has collapsed once again, leaving millions of people without electricity. The grid failed on Friday evening about 8:15pm (00:15 GMT) after a breakdown at Diezmero substation in the capital,