The group has been linked to human trafficking networks that move migrants north through Central America and Mexico, with stops in border cities like Tapachula and Tijuana - and eventual arrivals in U.

The U.S. Treasury sanctioned six leaders and affiliates of the Venezuelan gang Tren de Aragua, including the head of the group, known by the alias "Niño Guerrero."

The sanctions apply to kingpin Hector “Niño” Guerrero and his top five lieutenants. Guerrero has a $5 million reward on his head after taking Tren de Aragua from a prison gang in Venezuela to a full-blown foreign terrorist organization with tentacles across the U.