"The (Mexican) Defense Department has warned the United States about weapons entering Mexico that are for the exclusive use of the US army," Foreign Relations Secretary Alicia Bárcena said, who was quoted by AP News.

Bárcena said, "It is very urgent that an investigation into this be carried out."

In June, the Mexican Army announced it had seized a dozen rocket launchers, 56 grenade launchers, and 221 fully automatic machine guns since 2018.

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