The lights went out across much of Venezuela, reviving fears of the blackouts that plunged the country into chaos a few months ago as the government once again accused opponents of sabotaging the nation’s hydroelectric power system.

The power in the capital went out after 4 p.m. Monday and immediately backed up traffic as stop lights and the subway stopped working during rush hour. As night fell in Caracas many were wondering how long they would be left in the dark.