Photos show burned-out cars, empty streets, and airport chaos in Mexico after a major cartel leader was killed

Vehicles were set alight in Puerto Vallarta as violence broke out following the killing of cartel leader "El Mencho."

@morelifediares via Instagram/Yo/Reuters

• Violence broke out across Mexico on Sunday after a top cartel leader was killed.
• Photos show burned-out buses, roadblocks, and a heavy Mexican military presence on the streets.
• The US warned its citizens in Mexico to shelter in place.

Popular tourist sites in Mexico were caught up in a wave of violence...