Gangs have terrorized people with extortion and killings for years. El Salvador's government cut deals with leaders of the MS-13 gang in an attempt to reduce the killings.
Members of the MS-13 and 18 gangs were packed into overcrowded cells at three prisons in El Salvador.
The MS-13 gang, a reference to its Spanish name “Mara Salvatrucha,” has footholds across Central America, Mexico and the United States, where it is linked to human trafficking, drug networks and targeted killings.
In June, U.S. authorities arrested and charged more than two dozen alleged MS-13 leaders and members, including one suspected gang boss facing terrorism charges.