Cuba experienced a second nationwide power grid collapse in less than a week, with officials confirming Saturday that the country’s electrical system suffered a “total disconnection.”

The Ministry of Energy and Mines said the National Electric System, which supplies power across the island, went offline and that restoration efforts were underway. Authorities did not immediately provide a cause for the outage.

The latest disruption follows a similar nationwide failure reported Monday, after which service was not fully restored until the next day. Even after power returned, electricity demand continued to exceed available generating capacity throughout the week.

The repeated outages highlight ongoing instability within Cuba’s energy infrastructure, which has struggled with aging equipment, limited fuel supplies, and rising demand.

Cuban President Miguel Díaz-Canel linked the situation to U.S. policy, accusing Washington of imposing pressure that has weakened the country’s economy and energy sector. In recent remarks, he said the United States has sought to isolate Cuba and warned of continued resistance to external pressure.

Officials have not indicated how long it may take to fully restore power following the latest collapse.