Cuba's largest oil supplier, Venezuela, has reduced shipments to the island to an average of 32,600 barrels per day in the first nine months of the year, barely half the 60,000 bpd sent in the same period of 2023, according to vessel-monitoring data and internal shipping documents from Venezuela's state company PDVSA.

Cuba's government said on Saturday it had made some progress in gradually re-establishing electrical service across the island, including to hospitals and parts of the capital Havana, after state-run media earlier reported the national grid had collapsed for a second time in 24 hours.

Cuba has restored a trickle of power to its grid by mid-evening, officials said, hours after the island plunged into a countrywide blackout following the collapse of one of its major power plants.