Mexican forces killed cartel boss "El Mencho" and seized rocket launchers capable of downing aircraft, revealing CJNG's extensive military arsenal.

The U.S. advised Americans in Jalisco, Tamaulipas, Michoacán, Guerrero and Nuevo León to take immediate shelter in their homes or lodgings.

El Mencho or Nemesio Rubén Oseguera Cervantes, head of the Jalisco New Generation Cartel (CJNG), was killed by Mexican military forces on Sunday.

By Drazen Jorgic MEXICO CITY, Feb 22 (Reuters) - Mexican drug lord Nemesio Oseguera, commonly known as 'El Mencho,' infamous for the bloody trail of bodies he left behind in battles with government forces and rival gangs,