Police discovered 17 undocumented immigrants locked inside a tractor-trailer in Texas Sunday morning, according to the Edinburg Police Department.
Oscar Treviño, Edinburg's assistant police chief, said the immigrants may have been locked inside the truck for eight or nine hours.
Sometime before 11 a.m., Edinburg dispatch received a call from an unknown individual in Mexico who reported that a relative was trapped inside a tractor-trailer parked at a local gas station.
The caller said the relative and other immigrants were battling the summer heat.
When police arrived on the scene, they began knocking on all of the tractor-trailers in the gas station's parking lot until they heard someone knocking back from inside.
Treviño said the undocumented immigrants are from Guatemala, Honduras, Mexico and Romania. Luckily, no one had to be taken to the hospital for medical attention.
Authorities took a male and female of Cuban nationality, who were responsible for the tractor-trailer, into custody.
Edinburg police bought water and pizza for the immigrants after they were rescued. Border Patrol is still investigating the incident.
This comes less than a month after nine people were killed and 30 others were hospitalized in an immigrant smuggling case out of San Antonio, Texas.
Our affiliate KGBT contributed to this report.