HARLINGEN, Texas (Border Report) -- Four people, including two who law enforcement say are in the United States illegally, have been arrested on charges of leading a human smuggling ring in the Rio Grande Valley of South Texas.

Enrique Gonzalez, 57, of Weslaco, and Mexican national Erick Vallejo-Zapata, 21, are set for their initial appearances on Friday in federal court in McAllen before U.S. Magistrate Judge Juan Alanis, U.S. Attorney Nicholas Ganjei said Thursday.

Rigoberto Esteban Perez-Cruz, 37, of Edinburg, and Mexican national Mirza Garcia-Zapata, 37, have already made their appearances, and remain in custody. They have detention hearings on Tuesday, Ganjei said.

A criminal complaint alleges that all four harbored migrants at residences throughout Hidalgo County. Gonzalez, Vallej

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