The Hidalgo County Sheriff's Office has launched an investigation after discovering 84 migrants in the town of Olivarez, just north of Weslaco.
Deputies got a call from someone who saw people getting out of a tractor-trailer in Olivarez.
Members of the Sheriff's Office and the U.S. Border Patrol both responded to the scene.
Hidalgo County Sheriff Sheriff Eddie Guerra says they rescued 84 migrants.
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