"The decision could generate more incentives to generate auto parts in our country," the tweet said.

Mexico's economy ministry told Reuters it would speak on the subject "once the resolution becomes official." A spokesperson for the presidency did not immediately respond to a request for comment.

Deputy Economy Minister Alejandro Encinas Najera told press earlier this week that a preliminary ruling had already been reached and would be made public around Jan. 13.

Mexico is also in a trade dispute with the United States regarding its energy policies, which the United States calls nationalist and unfriendly to U.S. firms and a violation of the United States-Mexico-Canada Agreement (USMCA).

A third round of consultations in the spat should be held between late December and early January, Encinas said.

(Reporting by Kylie Madry and Adriana Barrera; Editing by Daina Beth Solomon and Stephen Coates)