Venezuela has cut ties with Colombia, after being accused of harbouring FARC rebels.
At a meeting of the Organisation of American States (OAS), Colombian ambassador Luis Alfonso Hoyos demanded an international commission investigate sites in Venezuela where the guerrillas are believed to be hiding.
He accused Caracas of helping rebels responsible for kidnappings, drug-trafficking and murder.
Speaking at the OAS meeting, Hoyos said: “Colombia does not want to return to this nightmare. And I say to the people of Venezuela, don’t let yourselves be enslaved by this nightmare. It is a tragedy we have suffered.”