BREAKING: Mexico’s Most-Wanted Cartel Boss Killed by Security Forces, Officials Say Nemesio

​One video posted on social media showed a group of heavily armed men setting fire to a petrol station in Guadalajara after pulling up in a white car.

By Sunday night, Guadalajara turned into a ghost town as civilians hunkered down. School was cancelled on Monday in several states.

The US had offered a $15m (£11m) reward for the capture of El Mencho, who was accused of smuggling huge quantities of cocaine, fentanyl and methamphetamine across its southern border. El Mencho’s cartel, which was founded about 16 years ago and had become Mexico’s most influential crime group, was also accused of attempting to assassinate Mexican government officials.