Investigation into Deaths in Texas Shipping Container
Federal agents are investigating the deaths of individuals believed to be immigrants found inside a shipping container at a Union Pacific rail yard near the Mexico border in Laredo, Texas, on Sunday. Authorities are treating the incident as a "potential human smuggling event."
Officials have also indicated that the death of a seventh person, whose body was discovered near railroad tracks outside San Antonio—approximately 150 miles (241 km) north of Laredo—may be connected to the case.
A Union Pacific employee discovered the bodies of six people inside the shipping container on Sunday afternoon, according to Jose Baeza, the public information officer for the Laredo Police Department.
Medical Examiner's Findings
Dr. Corinne Stern, the Webb County medical examiner, is conducting autopsies on the deceased. She has completed one autopsy for a 29-year-old Mexican woman, determining the cause of death as hyperthermia, or heatstroke.
“I’ve ruled that an accidental death,”
she said, adding that she believes the others also died from heatstroke but cannot confirm their causes of death until all autopsies are completed.
Stern estimates that it took up to eight hours for the individuals to succumb to illness.
“Based on my examination on the scene and what I know of from the investigation, I really believe they were dead in less than eight hours,”
Stern stated.
Identification cards and cellphones found at the scene suggest the deceased may be from Mexico and Honduras. Fingerprints were taken and shared with U.S. Border Patrol to assist in confirming identities and nationalities through the Missing Alien Program. The medical examiner’s office also contacted the Mexican consulate after identifying the woman.
Law Enforcement Response
Homeland Security Investigations issued a statement confirming it is "actively investigating this case as a potential human smuggling event with assistance from the Laredo Police Department and Texas Rangers."
“This was a horrific scene,”
Stern said, noting that immigrant deaths are common in the 10-county region her office covers. She added,
“This spring has been busier than it was this time last year,”
referring to the number of migrant deaths recorded by her office in the previous year.
According to CBS News, Bexar County Sheriff Javier Salazar, whose jurisdiction includes San Antonio, stated that investigators found the seventh deceased person while responding to an alert indicating one of the containers had been opened over the weekend near the location of the body.
“On these trains, there is a censor on some of the containers that alerts whenever a container’s opened,”
Salazar said to reporters. He added,
“Once those bodies were found in Laredo, they came back to this location here and started patrolling up and down the railroad tracks until such time that they found him.”
Salazar also noted that the container cannot be opened from the inside.
Context and Background
Border encounters decreased toward the end of Joe Biden’s presidency and reached record low numbers during Donald Trump’s second administration. In March, approximately 40 people were encountered daily crossing illegally by Border Patrol agents in Laredo, making it the third busiest sector among nine along the border, according to agency statistics.
The travel history of the shipping container remains unknown, and the ongoing criminal investigation has not yet determined why the individuals who died did not exit the container.
Union Pacific issued a statement expressing sorrow over the incident and confirming cooperation with law enforcement.
“Union Pacific is saddened by this incident and is working closely with law enforcement to investigate,”
the rail company said.
Laredo is a major land port of entry for trade on the U.S.-Mexico border and a common point for the illegal movement of people.
On June 28, 2025, two smugglers were convicted in connection with the deadliest human smuggling attempt in the U.S. across the southern border. They were found guilty in relation to the deaths of 53 migrants discovered in the back of a sweltering tractor-trailer in Texas in 2022.
Smuggling on trains crossing the border has been a longstanding concern, partly because trains often slow or stop in Mexico before crossing into the U.S. This pause creates opportunities for smugglers or immigrants to board or conceal drugs or other contraband on trains before they cross the border.
Union Pacific has collaborated with authorities for years to address drug smuggling and trespassing on trains near the border. As part of these efforts, the railroad has installed inspection portals that scan trains and capture images to detect abnormalities that may indicate contraband or unauthorized individuals aboard.
staff contributed reporting.
