Ten members or associates of the Venezuelan gang Tren de Aragua have been indicted on charges of running a gun-trafficking scheme in New York City that stretched across the country and aspired to spread internationally, officials said Wednesday.

The indictments, announced by Queens District Attorney Melinda Katz, came after a more than eight-month undercover operation by the district attorney’s office, New York City police and other law enforcement agencies. Six of the people charged in the 120-count indictment unsealed Wednesday were taken into custody Tuesday.

The Tren de Aragua gang has been linked to a series of kidnappings, extortion and other crimes throughout the Western Hemisphere tied to a mass exodus of migrants from Venezuela, where the gang originated more than a decade ago. Public awareness of Tren de Aragua in the U.S. climbed after footage from a security camera surfaced on social media showing a group of heavily armed men forcing their way into an apartment in the Denver suburb of Aurora.

— The Associated Press