National Guard officer Nahomi Martínez was killed during a February 22, 2026 operation targeting Nemesio Oseguera, the leader of the CJNG cartel. The security forces were ambushed by a criminal cell in Jalisco while attempting to arrest the cartel head, resulting in multiple casualties including Martínez.

Martínez, originally from Zacatecas, was part of the federal agents deployed to the operation. Mexico's defense secretary Ricardo Trevilla praised the dedication of the security personnel killed in the confrontation, stating their actions demonstrated the strength of the Mexican state. The operation reportedly led to Oseguera's arrest, though details remain unclear.

Tributes poured in from Martínez's home state, where she was remembered as young and dedicated to service. The Academic Preparatory Unit of the Autonomous University of Zacatecas, where she was a student, released a statement mourning her death. Local lawmaker Loly Trejo sent condolences to Martínez's family, noting she died defending the nation with honor. The basketball community also honored her memory, with teams sending condolences to her sister, professional player Nelsy Sánchez.