Four Mexican nationals illegally living in the U.S. have been charged in an alleged international human smuggling conspiracy that brought hundreds of illegal immigrants each week across the Canadian border to the U.S. for profit.

Edgar Sanchez-Solis, 23, Ignacio Diaz-Perez, 35, Samuel Diaz-Perez, 26, and Salvador Diaz-Diaz, 32, were charged with conspiracy to bring aliens to the U.S. and 25 counts of bringing aliens illegally to the U.S. for profit, according to a news release from the Justice Department.

All four men were arrested at various locations across the U.S. and detained, according to the release. Ignacio Diaz-Perez and Salvador Diaz-Diaz had previously been deported from the U.S.