The U.S. Geological Survey has estimated that the death toll from the powerful quakes could range from as many as 10,000 to 100,000.

Twin 7-magnitude earthquakes have hit Venezuela, causing buildings to collapse in Caracas, with warnings of further powerful aftershocks.

"Red alert for shaking-related fatalities and economic losses. High casualties and extensive..."

US Geological Survey estimates 44 per cent chance fatalities could exceed 10,000