At left is an opening in a metal fence along the U.S. -Mexico border in California.
"Human smugglers have proven time and again they have little regard for human life", Bovino told the AP.
According to the report, officials with U.S. Customs and Border Patrol (CBP) said surveillance video confirmed that the Ford Expedition carrying 25 passengers and a second vehicle identified as a Chevrolet Suburban carrying 19 passengers drove through the fence hole to enter the country early Tuesday.
"We continue in close collaboration with authorities with the aim of assisting the Mexican people killed and injured", Velasco said on Twitter.
Neither SUV was being pursued by Border Patrol personnel at the time of their accidents, the agency's release said. "We offer our profound condolences and reaffirm our commitment to the families of the persons who lose their lives". "They might have just been farm workers". The Ford Expedition can safely seat up to eight people.
"We did think, based on geography, that there was a likelihood that it was farmworker transport", Strater said.
Strater also looked at the debris photos and noted something missing: lunch boxes.
Exact details of the incident were still being unraveled Wednesday.
The big rig was traveling north on a two-lane highway, and the SUV was going west along a road where there's a stop sign before it intersects with the highway, CHP Officer Arturo Platero said.
There were only two seats in the SUV - the driver's seat and the front right seat. This is where the Expedition and gravel truck had collided.
Law enforcement officials have also reportedly said that when a team of first responders reached the site of the accident, they found numerous occupants trying to crawl out of the vehicle. The age range of the injured people, he said, is from 15 to 55 years old.
Accounts on the number of passengers in the SUV and the number of fatalities vary. Multiple calls to the business were unanswered.
One of the SUVs, said to have 25 illegal immigrants crammed inside, soon became involved in a deadly crash at State Highway 115 and Norrish Road in Holtville that killed 12 of the vehicle's occupants at the scene and a 13th a short time later, the Los Angeles Times reported.
Cruz said four patients were flown out to Desert Regional Medical Center in Palm Springs, six are being treated at El Centro Medical Center, and three were taken to Pioneers Memorial Hospital in nearby Brawley. He also said the SUV was not fleeing authorities and no pursuit of the vehicle had been underway. Others remain in serious condition with a variety of traumatic injuries.
Judy Cruz, the emergency department director for El Centro Regional Medical Center, initially said 27 people were riding in the SUV when it crashed and that 15 people had died, including 14 at the scene and one at the hospital.