Several people were arrested after another agent stopped the second vehicle, but the third vehicle didn't stop when an agent tried to pull it over, Customs and Border Protection said.
The SUV carrying 14 people went out of control at more than 100 miles per hour and overturned on Texas Highway 85, ejecting most of the occupants, Dimmit County Sheriff Marion Boyd said.
In this image tweeted by David Caltabiano of KABB/WOAI, a heavily damaged SUV is seen on Texas Highway 85 in Big Wells, Texas, after crashing while carrying more than a dozen people fleeing from Border Patrol agents, Sunday, June 17, 2018.
"This, I think, is a ideal example, of why are borders need to be secured", Boyd said. There were 14 people in the Suburban, including the driver, according to the department. Authorities believe the driver and one passenger are USA citizens. This includes the driver, who is believed to be a United States citizen.
Boyd said the driver of the SUV survived and was taken into custody. He would not confirm if any of the patients had died.More news: Golden Boot, Golden Glove, Group standings after Portugal vs Spain match
Authorities are investigating the scene where a vehicle full of undocumented immigrants being chased by Border Patrol agents crashed.
Boyd added that a wall is not the only answer. "There needs to be sensors".
"The Border Patrol was pursuing a vehicle and one of my deputies assisted in the pursuit, and took over the pursuit just west of Big Wells", Mr. Boyd told KSAT-12.
In a statement, the Border Patrol said the chase began after an agent spotted "three vehicles traveling in tandem pass his location on a rural highway" and the agent suspected that "a smuggling event was taking place".