The Mexican military killed one of Mexico's most notorious drug ​lords, Nemesio Oseguera, or "El Mencho," Sunday that sparked widespread violence across the country.

President Claudia Sheinbaum has been under mounting pressure from Washington to intensify her offensive against drug ⁠cartels blamed for producing and smuggling drugs, particularly the synthetic opioid ⁠fentanyl, across the border to the U.S.

Oseguera, 60, the mastermind of the powerful Jalisco New Generation Cartel (CJNG) died in custody after being injured in a military operation by Mexican special forces in the town of Tapalpa on Mexico's Pacific ​coast in Jalisco state, according to Mexico's Defense Ministry.

His corpse arrived in Mexico City ​Sunday ⁠afternoon in a heavily guarded convoy of National Guard troops.

Reuters had reported Sunday that a new U.S.-military-led task force played a role in the raid led and carried out by Mexican forces.