What to know about the killing of the powerful cartel leader ‘El Mencho’ in Mexico

MEXICO CITY (AP) — The Mexican army killed the country’s most powerful cartel leader and one of the United States’ most wanted fugitives, notching a major victory while cartel members responded with a wave of violence across the country.

The killing Sunday of Jalisco New Generation Cartel leader Nemesio Oseguera Cervantes during an attempt to capture him in Jalisco state was the highest-profile blow against cartels since the recapture of former Sinaloa cartel boss Joaquín “El Chapo” Guzmán a decade ago.

Following Oseguera Cervantes' death, security forces were placed on alert throughout the country as gunmen unleashed violence. Cars torched by cartel members blocked roads in 20 Mexican states. People locked themselves in their homes in Guadalajara, Mexico's second-largest city and Jalisco's capital, and school was canceled Monday in several states.

The killing could give the government a leg up in its dealings with the Trump administration, which has been threatening tariffs or unilateral military action if Mexico does not show results in the fight against the cartels. But the long-term effect on Mexico's security landscape remains unclear.

Here's what to know:

Oseguera Cervantes, better known as “El Mencho,” was 59 years old and originally from the western state of Michoacan. His ties to organized crime went back at least three decades.

In 1994, he was tried for trafficking heroin in the U.S. and sent to prison for three years. Upon returning to Mexico, he quickly rose through Mexico's drug trafficking underworld.

Around 2009, he founded the Jalisco New Generation Cartel, which became Mexico's fastest-growing criminal organization, moving cocaine, methamphetamines, fentanyl and migrants to the United States, and using violence with the use of drones and improvised explosive devices.

The cartel earned a reputation for brazen attacks on Mexican security forces, including downing a military helicopter in Jalisco in 2015 and attempting a spectacular, but unsuccessful, assassination of Mexico City Police Chief Omar García Harfuch, who is now Mexico's federal security secretary.

It recruited aggressively, experimenting with new ways to reach potential members online, and generated revenue through fuel theft, extortion and timeshare fraud, among other activities.

Oseguera Cervantes was killed during an attempt to capture him, as his followers attempted to fight off Mexican troops.

Mexico's Defense Secretary Ricardo Trevilla said Monday that the army and National Guard launched an operation in the southern part of Jalisco state to capture Oseguera Cervantes, involving the Mexican air force and special forces. Intelligence gathered about one of Oseguera Cervantes' romantic partners led them to his hideout, he said.

The cartel counterattacked, and in the ensuing confrontation, federal forces killed eight members of the criminal group. Oseguera Cervantes and two of his bodyguards were wounded and died later during transfer by air to Mexico City, Trevilla said.

Rocket launchers capable of shooting down aircraft and destroying armored vehicles were seized at the scene.

Oseguera Cervantes' death will help Mexico's government show results to the U.S., which is pressuring its neighbor to pursue drug cartels more aggressively. Both countries said intelligence cooperation helped lead to Sunday's operation.

Oseguera Cervantes was facing multiple indictments in the United States and the U.S. State Department had offered a $15 million reward for information leading to his arrest. The Trump administration designated his cartel and others foreign terrorist organizations a year ago.

U.S. Deputy Secretary of State Christopher Landau, who was U.S. ambassador to Mexico during the first Trump administration, applauded the operation via X, writing: “The good guys are stronger than the bad guys. Congratulations to the forces of law and order in the great Mexican nation.”

Mike Vigil, former chief of international operations for the DEA, said Mexico had sent “a strong message to Donald Trump's administration that they are fighting aggressively and effectively” against the most powerful cartels. He added that “the majority of the information came from the Mexican armed forces and all credit goes to Mexico.”

It's not clear who will succeed Oseguera Cervantes, or if any one person can.

The Jalisco cartel has a presence in at least 21 of Mexico's 32 states and is active in almost all of the United States, according to the U.S. Drug Enforcement Administration. But it is also a global organization and the loss of its leader could be felt well beyond Mexico.

“El Mencho controlled everything, he was like a country's dictator,” Vigil said.

His absence could slow the cartel's rapid growth and expansion and leave it initially weakened against the Sinaloa cartel on several fronts where they or their proxies are fighting. The Sinaloa is locked in its own internal power struggle, however, between the sons of “El Chapo” and the faction loyal to Ismael “El Mayo” Zambada, who is in U.S. custody.

Vigil said Mexico should seize the moment to launch “an effective frontal assault based on intelligence.”

“This is a big opportunity for Mexico and the United States if they work together,” he said.

Security analyst David Saucedo said that if relatives of Oseguera Cervantes take control of the cartel, the violence seen Sunday could continue. If others take power, they could be more willing to turn the page and continue operations.

The greatest fear would be that the cartel turns to indiscriminate violence. They could decide to “launch narcoterrorism attacks ... and generate a scenario similar to what Colombia lived in the 1990s,” a full-on attack against the government “car bombs, assassinations and attacks on aircraft.”

FILE - The letters "CJNG" for the group's formal name, Jalisco New Generation Cartel, covers the facade of an abandoned home in El Limoncito, in the Michoacan state of Mexico, Oct. 30, 2021. (AP Photo/Eduardo Verdugo, File)

Mexican President Claudia Sheinbaum looks at a slide with information about Jalisco New Generation Cartel leader Nemesio Oseguera, known as "El Mencho," during her the daily, morning news conference at the National Palace in Mexico City, Monday, Feb. 23, 2026, the day after the Mexican army killed the cartel leader. (AP Photo/Ginnette Riquelme)

This wanted poster released on Dec. 4, 2024 on the U.S. State Department website shows leader of the Jalisco New Generation Cartel, Nemesio Rubén Oseguera Cervantes, known as “El Mencho.” (U.S. State Department via AP)

National Guards patrol the area outside of the General Prosecutor's headquarters in Mexico City, Sunday, Feb. 22, 2026, after authorities reported that the Mexican Army killed Jalisco New Generation Cartel leader Nemesio Oseguera, known as "El Mencho." (AP Photo/Ginette Riquelme)

A charred vehicle sits at a damaged supermarket in Guadalajara, Jalisco state, Mexico, Sunday, Feb. 22, 2026, after the death of the leader of the Jalisco New Generation Cartel, Nemesio Rubén Oseguera Cervantes, known as "El Mencho." (AP Photo/Alejandra Leyva)

Pedestrians walk past a charred vehicle after it was set on fire, on a road in Cointzio, Michoacán state, Mexico, Sunday, Feb. 22, 2026, after the death of the leader of the Jalisco New Generation Cartel, Nemesio Rubén Oseguera Cervantes, known as "El Mencho." (AP Photo/Armando Solis)

A soldier stands guard by a charred vehicle that was set on fire in Cointzio, Mexico, Sunday, Feb. 22, 2026, amid reports the Mexican Army killed Jalisco New Generation Cartel leader Nemesio Oseguera, known as "El Mencho." (AP Photo/Armando Solis)

A police officer stands guard by a charred vehicle after it was set on fire, on a road in Guadalajara, Jalisco state, Mexico, Sunday, Feb. 22, 2026, after the death of the leader of the Jalisco New Generation Cartel, Nemesio Rubén Oseguera Cervantes, known as "El Mencho." (AP Photo/Alejandra Leyva)

DENVER (AP) — A Frontier Airlines plane hit and killed a pedestrian on the runway of the Denver International Airport during takeoff, airport authorities said, sparking an engine fire and forcing passengers to evacuate.

The plane, on route from Denver to Los Angeles International Airport, “reported striking a pedestrian during takeoff at DEN at approximately 11:19 p.m. on Friday," the airport's official X account wrote.

A spokesperson for the airport said the pedestrian, who jumped a perimeter fence, has died. They said the unidentified person was hit two minutes after entering the airport. The person is not believed to be an airport employee.

“We're stopping on the runway,” the pilot tells the control tower according to the site ATC.com. “We just hit somebody. We have an engine fire.”

The pilot tells the air traffic controller they have “231 souls” on board and that an “individual was walking across the runway.”

The air traffic controller responds that they are “rolling the trucks now" before the pilot tells the tower they “have smoke in the aircraft. We are going to evacuate on the runway.”

Frontier Airlines said in a statement flight 4345 was the one involved in the collision and that “smoke was reported in the cabin and the pilots aborted takeoff.” It was not clear whether the smoke was linked to the crash with the pedestrian.

“The Airbus A321 was carrying 224 passengers and seven crew members,” the airline said. “We are investigating this incident and gathering more information in coordination with the airport and other safety authorities.”

Passengers were then evacuated via slides and the emergency crew bused them to the terminal. The airport spokesperson said 12 passengers suffered minor injuries and five were taken to local hospitals.

Denver Airport said the National Transportation Safety Board had been notified and that runway 17L, where the incident took place, will remain closed while an investigation is conducted. It is expected to open later today.

The pedestrian death came a day after a Delta Air Lines employee was killed while on the job at the Orlando International Airport. In a statement, the airline said the employee was killed Thursday night without providing details of the incident nor the name of the employee.

“We are focused on extending our full support to family and taking care of our Orlando team during this difficult time,” the airline said. "We are working with local authorities as a full investigation gets underway to determine what occurred.”

FILE - A Frontier Airlines jetliner taxis down a runway for take off from Denver International airport on Nov. 25, 2025, in Denver. (AP Photo/David Zalubowski, File)