Burned cars and trucks, allegedly set on fire by organised crime groups in response to an operation to arrest a high-priority security target, on a highway near Acatlan de Juarez, Jalisco state, Mexico. Photograph: Ulises Ruiz/AFP/Getty Images Mexico is on alert after cartel gunmen went on a violent rampage of revenge in response to federal forces killing their leader, a notorious mob boss known as “El Mencho”.