Mexico's most-wanted fentanyl kingpin "El Mencho" reportedly killed after military forces tracked his romantic partner to secret meeting location.

Mexican security forces kept up their battle with cartel gunmen following the killing of the country's most powerful drug lord, which sparked a surge in violence and left more than 70 people

Mexico's operation to capture cartel leader Nemesio Rubén Oseguera Cervantes, known as "El Mencho," ended in his death and sparked massive violence. CBS News' Karen Hua reports.

Trump tells Mexico to ‘step up’ effort to combat cartels even after military operation kills drug lord known as ‘El Mencho’

Meanwhile, heavily armed Mexican security forces kept up their battle with cartel gunmen following the killing that sparked a surge in violence and put the country on edge. Cartel fighters continued to block roads as smoke rose on the outskirts of the town in the state of Jalisco.