Argentinian Security Secretary Sergio Berni said about 19,000 households were without power in the capital, some for as long as 12 days.
"We are working first of all on the restoration of the network in the capital, in those neighborhoods most affected. We have been working all night with the technicians, mostly from Edesur, with the police and the border guards," he said.
"The city on the whole is supplied with power except for those particular areas, which is unacceptable, but we are working in order to give those residents power very soon," Berni added.
Residents angry with the blackouts set up roadblocks, blocking traffic along the Arturo Illia and the La Plata-Buenos Aires thoroughfares, the Buenos Aires Herald reported Monday.