Mexican President Claudia Sheinbaum said on Monday that her government had asked the United States to provide evidence of alleged gunfire from Mexican territory toward the US border.
“We have asked for all the evidence that this happened because we have no evidence,” Sheinbaum said at her daily news conference. She added that Mexico’s National Guard, Defense Ministry and Navy had not detected shots being fired toward the United States.
The request followed comments by US Ambassador to Mexico Ronald Johnson, who said US Coast Guard personnel had been targeted by gunfire in the border area.
After the reports, Mexico and the United States launched coordinated patrols on their respective sides of the border. Mexico sent 500 Army and National Guard personnel to Tamaulipas state as part of “Operation Mirror,” Mexican authorities said.
The deployment covers Nueva Ciudad Guerrero, Mier, Miguel Aleman, Camargo and Diaz Ordaz, municipalities in northern Tamaulipas along the border with Texas.
Mexican authorities said the force includes two UH-60 helicopters operated by the Mexican Air Force, as well as drones and anti-drone equipment.
The operation is part of bilateral security mechanisms established in February 2025 to address drug trafficking, human trafficking and other criminal activity along the border.