Secretary of State Rex Tillerson and Homeland Security Secretary John Kelly visited Mexico City on Wednesday, in the first visit by senior Trump administration officials since Mexican President Enrique Peña Nieto canceled a planned meeting with President Trump last month. The pair sought to improve relations with Mexico after Trump promised to force Mexico to pay for an expanded border wall and after his administration announced plans for mass deportations to Mexico—including immigrants who are not Mexican citizens. On Wednesday, Mexico’s foreign minister, Luis Videgaray, angrily denounced those plans.

Luis Videgaray: “I want to say clearly and emphatically that the government of Mexico and the Mexican people do not have to accept provisions that one government unilaterally wants to impose on the other. We will not accept it, because there’s no reason why we should and because it is not in the interests of Mexico.”

The foreign minister added that Mexico will ask the United Nations to help preserve the rights of immigrants inside the United States.