The six people found dead inside a Union Pacific boxcar in Laredo, Texas, on Sunday are believed to be illegal aliens from Mexico and Honduras.
According to the Laredo Police Department, a Union Pacific employee discovered at least six dead bodies in the cargo train car.
Temperatures soared into the upper 90s in Laredo, Texas, on Sunday.
Laredo, Texas, borders Mexico and has one of the largest ports of entry in the US.
The six people died of hyperthermia, or heat stroke.
The deaths are being investigated as part of a human smuggling operation.
ABC News reported:
Federal agents are investigating the deaths of six people thought to be immigrants found inside a shipping container at a Union Pacific rail yard near the border with Mexico in Laredo, Texas, on Sunday as a “potential human smuggling event.”