MEXICO CITY — According to the Mexican government, the U.S. is not fully cooperating to stop gun trafficking. Mexico is also accusing the former U.S. ambassador of providing false information. An estimated 70% of guns used for crime in Mexico come from the U.S. — and many of them from Arizona.

During an online event from the Mexican Consulate in Tucson and the University of Arizona, the chief of Office of Mexico’s Secretary of Foreign Affairs, Fabián Medina, said they are not getting the expected support from the U.S. government.

"Lots and lots of ammunition crosses into Mexico through Nogales," Medina said.

He said weapons are also easily crossing through other border towns since the U.S. is not reinforcing operations.

Medina said Mexico has requested the U.S. to mirror their operations in 13 Mexican border cities, in which they are using nonintrusive technology to detect smugglers.

The diplomat also said that the former U.S. ambassador, Christopher Landau, lied when he said weeks ago that Mexico had rejected tech support from the U.S. to face this matter.