President Donald Trump on Sunday announced retaliatory tariffs on Colombia after its president blocked US military deportation flights from landing, the first instance of Trump using economic pressure to force other nations to fall in line with his mass deportation plans since he took office last week.

Hours after Trump’s announcement, Colombian President Gustavo Petro said he ordered the commerce ministry to raise tariffs on US imports by 25%. “I am informed that you impose a 50% tariff on the fruits of our human labor to enter the United States, and I do the same,” Petro wrote in a long post on X aimed at Trump, before he announced the 25% tax on US goods.

Earlier in the day, Petro announced he had blocked two US military flights carrying migrants heading toward the country and called on the United States to establish better protocols in its treatment of migrants. Petro also left the door open to receiving repatriated migrants traveling on civilian planes.

Following Petro’s initial announcement, Trump criticized him on social media while announcing a slate of new sanctions and policies targeting Colombia, including “emergency 25% tariffs” on all imports from the country that will be raised to 50% in a week, a “travel ban” for Colombian citizens, and a revocation of visas for Colombian officials in the US along with “all allies and supporters.”

“These measures are just the beginning. We will not allow the Colombian Government to violate its legal obligations with regard to the acceptance and return of the Criminals they forced into the United States!” Trump wrote on Truth Social.

Petro responded dismissively to Trump’s announcement, writing on social media, “Trump, I don’t really like traveling to the US, it’s a bit boring.” He went on to criticize Trump’s policies and character, even suggesting the US president considers “me an inferior race and I’m not, nor is any Colombian.”