Colombia will reject deportation flights from the United States after Brazil decried the treatment of migrants arriving handcuffed and shackled, complicating President Donald Trump’s plans and providing a contrast with the cooperative acceptance of Mexico and Guatemala.

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.

Trump said the measures were necessary, because the decision of Colombian President Gustavo Petro “jeopardized” national security in the U.S.