GUADALAJARA, Mexico, Feb 23, (AP): School was canceled in several Mexican states and local and foreign governments alike warned their citizens to stay inside, as widespread violence erupted following the army's killing of the powerful leader of the Jalisco New Generation Cartel. Nemesio Rubén Oseguera Cervantes, known as "El Mencho” was the boss of one of the fastest-growing criminal networks in Mexico, notorious for trafficking fentanyl, methamphetamine and cocaine to the United States and staging brazen attacks against government officials who challenged it.

He was killed during a shoot-out in his home state of Jalisco as the Mexican military attempted to capture him. Cartel members responded with violence across the country, blocking roads and setting fire to vehicles. President Claudia Sheinbaum urged calm and authorities announced late Sunday they had cleared most of the more than 250 cartel roadblocks across 20 states.

The White House confirmed that the US provided intelligence support to the operation to capture the cartel leader and applauded Mexico's army for taking down a man who was one of the most wanted criminals in both countries. Mexico hoped the death of the world's biggest fentanyl traffickers would ease Trump administration pressure to do more against the cartels, but many remained hunkered down and on edge as they waited to see the powerful cartel's reaction.

Guadalajara, the capital of Jalisco state and Mexico's second-largest city, was almost completely shut down on Sunday as fearful residents stayed home. Passengers arriving to the city's international airport Sunday night were told it was operating with limited personnel because of the burst of violence. Jacinta Murcia, a 64-year-old nutrition products vendor, was among those nervously walking late Sunday night through the airport, where earlier in the day travelers sprinted and ducked behind chairs fearing violence.

Most flights into the city were suspended on Sunday. Murcia anxiously scrolled through news stories on social media showing the face of "El Mencho” and sent messages to her children, who were tracking her location as she tried to travel across the city to her house after dark. "My plan today leaving the airport is to see if there are any taxis, but I’m scared of everything. That there are blockades, that there’s a curfew, that something could happen,” she said. "I'm all alone.” Authorities in Jalisco, Michoacan and Guanajuato reported at least 14 other people killed Sunday, including seven National Guard troops.