Cuba's efforts to restore power to the island were derailed for a third time late on Saturday, Cuban authorities said shortly before midnight, leaving millions in the dark and raising fresh questions over the viability of the government's bid to reestablish electrical service.

HAVANA (AP) — Some electricity was restored in Cuba, the government said Saturday, after the island nation's worst blackout in at least two years left millions without electricity for two days.

Cuba's government said late on Saturday it had restored power to nearly one-fifth of the island's people after the national grid collapsed twice in 24 hours, plunging millions of people into darkness.