After electricity was partially restored in Cuba following an island-wide blackout, the electrical grid collapsed a second time, causing widespread alarm. Journalist Ed Augustin told NBC News that while power is gradually being restored in some areas,

Information Nigeria reports that today’s occurence will be the third grid collapse in less than one month. The cause of the collapse is yet to be disclosed, but experts speculate it may be related to technical issues, infrastructure challenges or high demand.

Cuba’s electrical grid went down Friday after one of the island’s major power plants failed, a day after a massive blackout swept across the Caribbean island and with no official estimate for when service will be restored.