Colombian migrants returning home Tuesday on Colombian military flights described being shackled during earlier U.S. flights that were blocked by their country’s leader in a dispute with President Donald Trump that nearly sparked a trade war.

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.

The country’s leader, Gustavo Petro, backed down after a clash with President Trump, which started when Mr. Petro turned back U.S. military planes carrying deportees.