Cuba's capital was partially illuminated Monday night after a massive blackout that has generated a handful of protests and a stern government warning that any unrest will be punished.

Electricity has been restored to half of Havana, the Cuban capital's power company reported Monday, four days after the start of a nationwide blackout that the authorities have struggled to address. The government has said that electricity is expected to be restored to most of the country by the end of Monday.

By Monday afternoon, around 89 percent of customers in the capital had power again, however many residents outside Havana remained without electricity, according to the authorities.