Already home to three million Venezuelan refugees, Colombia is worried that over a million more could try to cross over.

President Gustavo Petro says Colombia rejects US aggression against sovereignty of Venezuela

Colombia could face its own turmoil from the stunning turn of events both in violence and a mass influx of refugees.

Already home to three million Venezuelan refugees, Colombia is worried that over a million more could try to cross over.

Caracas shake-up could intensify violence in Catatumbo in Colombia, an area rich with coca crops, cocaine laboratories and a porous border with Venezuela