Mexico reportedly announced Tuesday it has changed two of its top officials who are responsible for relations with the U.S., citing concerns about an anti-Mexico climate across the border.

Reuters reported Mexico named Carlos Sada as the ambassador to the U.S., while Paulo Carreno was appointed the deputy foreign minister for North America.

Sada previously served as the consul in Los Angeles and Carreno was one of President Enrique Pena Nieto’s communications directors. Sada will still have to be approved by the Mexican Senate.

“We have been warning that our citizens have begun to feel a more hostile climate," Foreign Minister Claudia Ruiz Massieu told a Mexican radio station. “This (anti-Mexican) rhetoric has made it clear that we have to act in a different way so that this tendency being generated doesn't damage the bilateral relationship.”

Mexican officials have expressed concerns about the rhetoric from Republican presidential front-runner Donald Trump due to his verbal attacks on Mexico and his vow to make Mexico pay for a border wall.

Tuesday, Trump threatened to block remittances from illegal Mexican immigrants if elected president, unless Mexico agreed to pay for his planned wall.

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