Experts have attributed recent blackouts in Cuba primarily to fuel shortages, aging infrastructure and economic sanctions. Outside of Havana, many Cubans have experienced rolling blackouts for weeks.Millions of people in Cuba remained without power for a second night in a row on Saturday as the island nation dealt with a major power outage.

The grid collapse follows a string of nationwide blackouts late last year that plunged Cuba's frail power generating system into near-total disarray, stressed by fuel shortages, natural disaster and economic crisis.

Cuba awoke to a near-total blackout after its national energy grid collapsed the previous night, plunging the island nation of 10 million people into darkness and exposing the fragility of its aging power infrastructure.