President Trump may have used his signature tough talk in phone conversations with foreign leaders that are typically reserved for delicate diplomatic discussion, according to a pair of reports published Wednesday evening.

Trump warned Mexican President Enrique Pena Nieto, who recently canceled a planned visit to the U.S. over the president’s immigration-related executive actions, that he might send military forces to confront “bad hombres” near the southern border unless the Mexican government did so itself, the Associated Press reported, citing what it described as a partial transcript of the phone call.