By business guide reporter

Venezuela is on the edge of collapse as food shortages trigger riots, looting and violence in the slums, long a bastion of support for the socialist government but now a flashpoint for unrest that threatens President Maduro.

He has introduced a new distribution system to end queues and black marketeers at state-subsidised supermarkets, but party officials say that this has already broken down and that conditions are ripe for civil war.

In the huge slum of Catia on Saturday thousands queued through the night for a few packets of flour, only to find that supplies had run out.