Tren de Aragua is a transnational criminal organization and U.S.-designated Foreign Terrorist Organization from Venezuela. It is believed to have over 5,000 members. Tren de Aragua is led by Héctor Rusthenford Guerrero Flores, alias "Niño Guerrero"; he was incarcerated in Tocorón prison, which functioned as the organization's de facto headquarters. The gang has since expanded throughout Latin America and the United States due to the Venezuelan refugee crisis, with the growth of the gang following the migration of Venezuelans to host nations. Due to the severity of its crimes, combating the gang has become a priority to many nations where Tren de Aragua has entered. Though Tocorón prison was taken by Venezuelan security forces in 2023, the leadership escaped and the gang's activities continue to this day.