Colombian President Gustavo Petro announced that Colombia was suspending permission for previously authorized U.S. deportation flights to land in Colombia. Ostensibly driving Petro’s action were concerns that Colombian nationals were not being treated with respect during the deportation process because they were being transported by military aircraft.

Colombia has walked back from the brink of a damaging trade war with the United States, reaching an agreement on accepting deported migrants being returned on military planes, after a flurry of threats from President Donald Trump that included steep tariffs.

President Trump announced on Sunday that he would impose 25% import tariffs on Colombia, the source of the majority of fresh-cut flower imports into the United States.