At least five persons died and several others hurt as an SUV carrying more than a dozen people crashed while fleeing from Border Patrol agents in South Texas.
Dimmit County Sheriff Marion Boyd said the SUV went out of control at more than 100 mph and overturned on Texas Highway 85, ejecting those inside.
Texas Department of Public Safety(DPS) officials said four were pronounced dead at the scene midday Sunday. A fifth person died at a hospital.
Most of the occupants were believed to be living in the country without legal permission.
Boyd told San Antonio television station WOAI a driver and one passenger are believed to be U.S. citizens. Both are in custody.
Some injured were taken by helicopter to San Antonio, about 90 miles (144.83 kilometres) northeast.
News Radio 1200 WOAI said rural Dimmit County, is on the main illegal immigrant smuggling route from Laredo to San Antonio favored by the smuggling cartels.
Both the 18 wheeler where 10 illegal immigrants died in San Antonio last summer, and the one that was found in a north side neighborhood last week originated in Laredo and passed through Dimmit County.
The DPS said a Border Patrol agent was trying to pull over the SUV when the driver attempted to speed away, lost control, and flipped over.