"It's going to get more complicated the way we see it, especially human rights for those who are simply looking for an opportunity to benefit their lives," said García Lara. "There have been many instances where soldiers are simply looking for migrants to prey on.

Mexican troops arrived in Ciudad Juárez and Tijuana this week and will soon patrol 18 cities near the Mexico-U.S. border.

Mexico deploys additional troops to Tijuana to boost border security and curb fentanyl trafficking into the U.S.