I wonder if the DEA wanted notice has anything to do with the decision?
Maybe or maybe not, but this is the official excuse from Venezuela:
Quote"In the last few hours, we have been informed, in an irrefutable manner, of an elaborate plan within the neo-fascist right wing, whose objective is to carry out a series of aggressions against our delegation headed by the President of the Republic, Nicolás Maduro Moros, for which they intend to put on a deplorable "show", in order to disrupt the positive effects of such an important regional meeting, and thus contribute to the discrediting campaign -already a failure- that has been launched against our country by the North American Empire", stated an official communiqué.
Translated with http://www.DeepL.com/Translator (free version)