SAN ANTONIO, Texas (KTRK) -- Authorities are investigating after 29 people were taken into custody in what they believe may be a possible smuggling operation involving a big rig in San Antonio.
San Antonio police said they received a call from a driver passing by Thursday night about suspicious activity on a big rig that was headed eastbound on I-10. An officer on scene initiated a traffic stop, but when he tried to make contact with the driver, the latch opened and multiple people ran out.
SEE ALSO: 5 undocumented people found in tractor-trailer in suspected human smuggling case in Katy, officials say
In total, authorities said 29 people, including men and women, were taken into custody. One person was taken to the hospital as a precaution due to dehydration.
While it's unknown how many people were inside the big rig, authorities said they believe there were up to 100 people inside.
"That's what we're hearing. That's the guesstimate right now," San Antonio PD Lt. Jesse Salame said. "We don't have a solid number on that."
SEE ALSO: HPD investigating possible human smuggling after 90 people found in SW Houston
Those in custody were provided with water and food and placed on buses headed to an undisclosed location, according to authorities.
The driver, who was among those taken into custody, could face federal charges.
An investigation is ongoing.
29 detained in possible smuggling case involving big rig in San Antonio
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