The state-run Electric Union said the collapse had stripped power from all eastern provinces from Guantánamo to Ciego de Ávila, and that crews were working to restore power, but it did not give an estimate for how long it would take.

El este de la isla sufrió un apagón masivo mientras en La Habana los cortes de energía ya superan las 19 horas diarias.

Protests flared in Havana amid widespread power outages. Cuba's energy minister says fuel has "run out" as a four-month US oil blockade chokes off energy supplies.