According to reports, 17 immigrants were locked inside the back of the trailer.
The immigrants were discovered in a trailer in Edinburg. The condition of the people found inside the vehicle were not known Sunday afternoon.
The caller said the relative was accompanied by other immigrants and that it was getting too hot inside the trailer, said White.
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KGBT in Harlingen says police received a call from a person in Mexico who claimed their family member was locked inside a trailer located at a Flying J's gas station.
Officials said the 17 immigrants, who did not have documents allowing them to be in the United States, were from Mexico, Guatemala, Honduras and Romania.
In July, authorities discovered more than 100 undocumented immigrants packed inside a sweltering tractor-trailer in San Antonio.
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"They were harbored in one or more stash locations, and on Sunday, the groups were assembled in the trailer", according to a federal complaint against Bradley, Fox reported at the time.
Police arrived at the truck stop and started knocking on trailers in the parking lot to find the trapped people.
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