Cuba experienced a total power failure Friday, according to the U.S. Embassy in Havana.

The embassy said the failure was due to the “collapse of Cuba’s electrical grid.”

According to Cuban regime media, the reason for the collapse is under investigation and the timeline to restore power is unknown.”

“All U.S. citizens in Cuba or planning to travel to Cuba should be aware and plan accordingly. There are reports of cellphone and internet outages,” the embassy added, noting that Cuba’s electrical grid is “increasingly unstable,” which has led to “multiple” nationwide power outages in the last few months.

Brie Stimson, Fox