MEXICO CITY, July 21 (Reuters) - Mexican President

Claudia Sheinbaum said on Monday the United States has not yet

formally notified her government of possible measures against

Mexico's airline sector pointing that she sees no reason for the

neighboring country to initiate such sanctions.

The comments come after the U.S. Department of

Transportation said on Saturday it would take action in response

to Mexico's decision to cut flight slots and force cargo

carriers to relocate operations in Mexico City, affecting U.S.

airlines.

"There is no reason for Mexico to receive any sanctions for

changes made to the capital's airport system," Sheinbaum said in

her daily press conference.

U.S. Transportation Secretary Sean Duffy said in a

statement on Saturday that the department may reject new flight

requests from Mexican carriers if concerns over airport

decisions made in 2022 and 2023 are not addressed.

The department would propose withdrawing antitrust immunity

granted to Delta Air Lines ( DAL ) for its joint venture with

Aeromexico to address competitive concerns, according

to the statement.