Cuba suffered its third nationwide blackout of the year on Monday as the country continues to battle an ongoing energy crisis.

The outage affected approximately 10 million people on the island nation before limited electricity service was restored in some areas, according to Fox News. The cause of the outage has not yet been identified.

"A total disconnection of the National Electric Power System is occurring," Cuba’s state-run Electric Union said. "The causes are being investigated. Microsystems are already operational throughout the country, to ensure protection for vital services."

The blackout caused public transportation to be largely halted, and officials said tens of thousands of surgeries were canceled nationwide, the outlet reported.

The outage comes after Cuba experienced two blackouts in March. The second outage was caused by the shutdown of Unit 6 at a power plant in Nuevitas, which set off a cascading failure across the rest of the country.

Cuban officials have blamed the situation on a U.S. energy blockade, following warnings from President Donald Trump in January about tariffs on countries supplying oil to Cuba.

"While the U.S. tries to induce a social explosion through asphyxiation by blocking fuel access to Cuba, the UNE mobilizes to reverse the SEN outage," Cuban President Miguel Díaz-Canel said Monday, referring to Cuba’s National Electric Power System. "What the electrical workers are doing in the midst of a genocidal energy blockade is heroic."

Cuba has long depended on foreign assistance and oil shipments from allies such as Mexico, Russia and Venezuela. Shipments from Venezuela were halted after the U.S. arrested its then-president, Nicolás Maduro.

Misty Severi is a news reporter for Just The News. You can follow her on X for more coverage.