Nine Americans with dual U.S.-Mexican citizenship were killed in an ambush attack near the border between the two countries, The Arizona Republic reported Tuesday, citing relatives of the victims and Mexican authorities.

A relative of the victims told CNN that at least nine family members, who are part of a Mormon community, were killed while traveling near the border.

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The group that was attacked has ties to Utah and got caught between two vicious drug cartels, according to Trump's tweet.

This is the time for Mexico, with the help of the United States, to wage WAR on the drug cartels and wipe them off the face of the earth. We merely await a call from your great new president! — Donald J. Trump (@realDonaldTrump) November 5, 2019

....monsters, the United States stands ready, willing & able to get involved and do the job quickly and effectively. The great new President of Mexico has made this a big issue, but the cartels have become so large and powerful that you sometimes need an army to defeat an army! — Donald J. Trump (@realDonaldTrump) November 5, 2019

Three vehicles traveling between the Mexican states of Sonora and Chihuahua were attacked by criminal groups, César Peniche Espejel, attorney general of the state of Chihuahua, indicated in a statement Tuesday, according to CNN.

Peniche Espejel reportedly said due to the remote location of the attack it has “not been possible to specify an official” total number of victims. Authorities in the state of Sonora have not confirmed the number of deaths, according to CNN.

Victims were mostly women and children and minors found with injuries, Peniche Espejel's statement reportedly said. CBS News reports that at least 6 of the victims were children.

Sonora Gov. Claudia Pavlovich Arellano tweeted that the state is cooperating with the investigation.

“I don't know what kind of monsters dare to hurt women and children,” she said, according to a Google translation of the tweet.

Como madre siento coraje, repudio y un profundo dolor por los cobardes hechos en la sierra entre Sonora y Chihuahua. No sé qué clase de monstruos se atreven a lastimar a mujeres y niños. Como Gobernadora toda mi colaboración para que no quede impune y paguen los responsables. — Claudia Pavlovich A. (@ClaudiaPavlovic) November 4, 2019

Alex LeBaron, who said he lost family members in the attack, told CNN the vehicles were targeted. He told the outlet the attack killed three women, four small children and two infants.

Updated at 8:15 p.m. on 12/1 to correctly note the number killed in the attack.