While Cuban officials said that power had been mostly restored, those still left in the dark vented their anger.
BBC's Will Grant reports from a pro-government demonstration held after the US indictment of the former president.
The BBC speaks to Havana residents after the US charges the country's former leader, Raúl Castro, with murder.
Cuba's foreign minister accused Rubio of trying to "instigate a military aggression".
The Trump administration has been putting tremendous economic pressure on the island's Communist government.
It comes after the US charged Raúl Castro with murder, the latest move putting pressure on the regime.
Cuba's current president says the charges against Castro — including conspiracy to kill US nationals and destruction of aircraft — are a "political manoeuvre".
BBC correspondent Will Grant reports from Havana, hours after the US charged former Cuban leader with conspiracy to kill US nationals and other crimes.
