The murderer has purportedly already been identified by the authorities, who have offered a reward of up to 5 million pesos (about $250,000) for information leading to his capture.
The crime, which is part of a growing wave of violence in Mexico, has shaken the country.
In just three and a half years of the López Obrador administration, there have already been more than 121,000 recorded homicides in the country, which is on track to exceed the more than 156,000 crimes committed during the six year term of his predecessor, Enrique Peña Nieto.
From January 1 to June 21 of this year, according to official figures, 12,481 homicides have taken place in Mexico.
The secretary general of the Mexican Bishops’ Conference lamented that in Mexico “the rate of violence and its structures of death have overflowed and set themselves up in our communities, disfiguring the human person and destroying the culture of peace, a culture of peace that makes us brothers.”
“Together with our people, we expect a response in keeping with the circumstances by the civil authorities at all levels,” he said.