At least a dozen people were killed as the streets of Caracas, Venezuela, erupted into a night of riots, looting and clashes between government opponents and the National Guard on the intervening night of Thursday and Friday.
The clashes are being observed as two days of pro-democracy demonstrations spilling into unrest in working-class and poor neighbourhoods, The New York Times reports.
Venezuela's attorney general's office said 11 people had died of electrocution and gunshot wounds "in acts of violence" in El Valle.
The clashes are a challenge to Venezuela's opposition politicians, who have been trying to channel resentment over President Nicolas Maduro's growing power into a peaceful protest movement.