Ask Onix
Mexico confirms death of CJNG cartel leader El Mencho
The Mexican defence ministry announced on Sunday that Nemesio Oseguera Cervantes, alias "El Mencho," the head of the Jalisco New Generation Cartel (CJNG), died while being transported to Mexico City following a fierce confrontation with security forces.
Operation details and violent aftermath
El Mencho sustained fatal injuries during clashes between his armed supporters and the military in Tapalpa, a town in the western state of Jalisco. Four CJNG members were killed in the exchange, while three soldiers were wounded. The defence ministry stated that the operation involved special forces, the Mexican Air Force, and the National Guard, with U.S. intelligence contributing to the planning.
In retaliation, CJNG launched coordinated attacks across eight states, setting vehicles ablaze, erecting roadblocks, and engaging security personnel. The U.S. State Department issued a shelter-in-place advisory for Americans in Jalisco, Tamaulipas, and parts of Michoacán, Guerrero, and Nuevo León.
Disruptions and travel chaos
Governor Pablo Lemus Navarro declared a code red alert in Jalisco, urging residents to stay indoors and suspending public transport. Smoke plumes were reported over Guadalajara, a host city for the upcoming FIFA World Cup, while Puerto Vallarta, a popular tourist destination, saw thousands stranded as airlines canceled flights. United Airlines, American Airlines, and Air Canada suspended services to Guadalajara and Puerto Vallarta, and a Delta flight from Atlanta was diverted to Austin.
El Mencho's criminal legacy
A former police officer, El Mencho, 59, led one of Mexico's most powerful drug trafficking organizations, responsible for smuggling vast quantities of cocaine, methamphetamine, and fentanyl into the U.S. The U.S. State Department had offered a $15 million reward for information leading to his capture. Former U.S. ambassador Christopher Landau called him "one of the bloodiest and most ruthless drug kingpins," while ex-DEA official Mike Vigil described his death as "one of the most significant actions in drug trafficking history."
The CJNG, founded in 2010, has gained infamy for brutal tactics, including downing a military helicopter with a rocket-propelled grenade and displaying victims' bodies publicly. The DEA considers it a rival to the Sinaloa Cartel, with operations spanning all 50 U.S. states.
Fentanyl trade and U.S.-Mexico relations
CJNG is a major supplier of fentanyl to the U.S., where 9,200 pounds (4,182 kg) of the drug were seized at the southwest border in the first half of 2025-96% of all U.S. fentanyl interceptions. The operation's success could bolster President Claudia Sheinbaum's anti-cartel efforts and ease tensions with Washington, though the violent backlash risks overshadowing the victory.
Sheinbaum urged calm on social media, noting that "most of the country" remained unaffected. However, analysts warn that without swift containment, the cartel's retaliation could escalate further.
What's next?
Security forces are monitoring hotspots as CJNG's influence spans multiple states. The Mexican government faces pressure to stabilize the situation before the World Cup, while U.S. officials may push for continued cooperation to dismantle cartel networks.
