HAVANA, Dec 13 (Reuters) - Cubans still reeling from months of hours-long blackouts now have a new problem on their hands: fuel shortages.

Many gas stations across the island have been shuttered for days as an unusually severe shortfall has left the nation nearly devoid of gasoline and diesel, stranding motorists and sprouting seemingly interminable lines at the pump in Havana.

"We have been waiting for a fuel truck to arrive for three days," said Armando Corrales from the driver's seat of his gray Kia SUV at a gas station in the capital. "People have slept here in line so they don't lose their spot."