Members of a violent Venezuelan gang know as Tren de Aragua have made their way to the United States and are believed to be linked to criminal cases in five states, including Illinois and Indiana, local law enforcement officials told NBC News.

Authorities confirmed to NBC News they’re investigating more than 100 criminal cases connected to suspected members of Tren de Aragua, and NBC Chicago confirmed at least two members have been arrested in Cook County for narcotics and weapons related charges.

Tren de Aragua is the largest criminal organization in Venezuela with more than 5,000 members.