According to NBC affiliate KPRC in Houston, the Edinburg Police Department confirmed Sunday that 17 immigrants were locked inside the back of a trailer.
A KRGV-TV reporter said Edinburg police had found 17 immigrants in the trailer. Edinburg is in southern Texas, along the US-Mexico border.
A male and female of Cuban nationality who were in charge of the tractor-trailer were detained, police said. Police said they believed the immigrants were in the truck for eight to nine hours.
The immigrants were from various other countries, including Mexico, Honduras, Guatemala, El Salvator and Romania, according to Trevino.
Police arrived at the truck stop and started knocking on trailers in the parking lot to find the trapped people.
Trevino said officers only knew the truck was at a truck stop about 20 miles north of the U.S. -Mexico border.
Last month, emergency responders found dozens of people in distress inside a hot semi-trailer at a Walmart in southwest San Antonio in an apparent smuggling operation. Ten people died of heat exhaustion in the botched human trafficking attempt.