Nineteen people were injured when a truck pulling a horse trailer with undocumented people inside overturned near the Golden Acorn Casino in Campo during a human smuggling attempt just before noon Saturday.
The patients were treated for their injuries and taken into Border Patrol custody.
Six people are still at area hospitals: four men were transported by ground and two women by air ambulance, according to Cal Fire San Diego and U.S. Customs and Border Protection.
Several people were seen running from the crash. It's unclear how many people were in the trailer or if the driver is in custody.
