Nemesio Oseguera Cervantes, the notorious leader of the Jalisco New Generation Cartel, was buried Monday in a golden casket at a cemetery in Zapopan, a suburb of Guadalajara, following his death in a military operation last week.

At least 55 people, including 25 security officers, have been killed across Mexico following the death of cartel leader Nemesio Oseguera Cervantes, widely known as “El Mencho,” head of the Jalisco New Generation Cartel (CJNG). His killing triggered a wave of retaliatory violence in multiple states.

Lufthansa said on Monday that it was continuing to operate flights to Mexico from Frankfurt and Munich, despite a surge in violence following a major military operation targeting a leading drug cartel figure.

School classes were suspended in several Mexican states and both local and foreign authorities advised residents to remain indoors after widespread violence erupted following the army’s killing of the leader of the Jalisco New Generation Cartel.

A passenger aboard a domestic Mexican flight reportedly attempted to hijack the plane and divert it towards the United States on Sunday morning.