In little more than a year, a once-obscure South American street gang has taken hold in the Big Apple, exploiting the migrant crisis to build a violent criminal enterprise from within the walls of city shelters.

Tren de Aragua, a Venezuela-bred crew of thugs, now terrorize Gotham with gun-toting, moped-riding hoods, sell illegal guns under the very noses of private shelter security guards, and run sleazy prostitution rings in neighborhoods suddenly besieged by the marauding migrants.

The gang, which also peddles a lethal fentanyl mix called Tussi or “pink cocaine,” has grown so fast that it has so far overwhelmed both average New Yorkers and the city’s elite police force.