Trump has no actual authority to restrict Venezuelan airspace, but he has presided over a significant increase of U.S. military forces in the region that could be a prelude to further action that the president says is aimed at curbing the flow of illegal drugs.

“To all Airlines, Pilots, Drug Dealers, and Human Traffickers, please consider THE AIRSPACE ABOVE AND SURROUNDING VENEZUELA TO BE CLOSED IN ITS ENTIRETY,” Trump wrote on Truth Social Saturday morning.

At least six commercial airlines had already suspended flights to Venezuela after the Federal Aviation Administration warned last week about deteriorating security conditions and “heightened military activity.”