MEXICO CITY - Many in Mexico were reeling Sunday from revelations that the shooting appeared to have been aimed at Hispanics - and Mexicans in particular.
Mexican Foreign Minister Marcelo Ebrard urged the U.S. government to establish a "clear and convincing position against hate crimes" after what he labeled "an act of terrorism" against Mexicans
On Monday, Ebrard raised the death toll of Mexican citizens to eight. He had previously said there were seven wounded, but that figure was not updated. Ebrard traveled to El Paso later Monday to meet with families of the victims.
"Mexico is outraged," he said.
On Monday, El Paso police raised the total toll to 21, saying via Twitter that another victim died at a hospital early Monday. An El Paso hospital announced another death later increasing it to 22.
Ebrard said Mexico would take legal action against the business that sold the shooter the gun and that its Attorney General's Office would declare it an act of terrorism against Mexican citizens. This would give Mexican prosecutors access to information about the case, Ebrard said. Then the Attorney General would decide whether to pursue the shooter's extradition to Mexico.
"For Mexico this individual is a terrorist," he said.
Just minutes before the rampage, U.S. investigators believe the shooter posted a rambling online manifesto in which he railed against a perceived "invasion" of Hispanics coming into the U.S. He then allegedly targeted a shopping area in El Paso that is about 5 miles (8 kilometers) from the main border checkpoint with Ciudad Juarez, Mexico.
Tens of thousands of Mexicans cross the border legally each day to work and shop in the city of 680,000 full-time residents, and El Paso County is more than 80% Latino, according to the latest census data.
The Mexican victims were identified as Sara Esther Regalado of Ciudad Juarez; Adolfo Cerros Hernández of Aguascalientes; Jorge Calvillo García of Torreon, Coahuila; Elsa Mendoza de la Mora of Yepomera, Chihuahua; Gloria Irma Marquez of Ciudad Juarez; María Eugenia Legarreta of the city of Chihuahua; Ivan Filiberto Manzano of Ciudad Juarez; and, Juan de Dios Velázquez Chairez of Zacatecas. Other victims may have also been of Mexican descent.
As the news dominated weekend headlines, some in Mexico said the shooting was the result of the simmering resentment that President Donald Trump had stirred early into his presidential campaign when he called Mexicans coming into the U.S. "rapists" and "criminals." The U.S.-Mexico relationship was only further strained after he took office and vowed to build a border wall and slap tariffs on Mexican imports.
On Sunday, López Obrador chose his words carefully when speaking of the shooting.
"In spite of the pain, the outrage" that Mexicans are feeling, he said, the U.S. is headed toward elections and Mexico doesn't want to interfere in the "internal affairs" of other countries. He also said the events in Texas reaffirmed his conviction that "social problems shouldn't be confronted with the use of force and by inciting hate."
Former President Felipe Calderón said via Twitter that regardless of whether the shooting is a hate crime, Trump "should stop his hate speech. He should stop stigmatizing others."
Amatza Gutiérrez, a student from the Mexican capital, said the idea of a shooter targeting Mexicans because of their ethnicity gives her goose bumps.
"I don't understand why anyone would go to that extreme," the 24-year-old said.
AP writer Christopher Sherman contributed to this report.