At least 13 people have died from a crash between a big rig and an SUV in Southern California Tuesday morning, according to the California Highway Patrol.
A Ford Expedition SUV entered the intersection with the big rig and subsequently the big rig, which was hauling two trailers, collided with the left side of the SUV, the highway patrol said.
Twenty-five people were in the Ford Expedition, the highway patrol said.
Many of the passengers were ejected onto the road, the highway patrol said, adding that there were not enough seatbelts for 25 people.
Twelve people, including the SUV driver, died at the scene, the highway patrol said. Another person from the vehicle died at a hospital, the highway patrol said. Those who died range in age from 20 to 55, officials said.
The highway patrol said the cause of the crash is not clear, adding that no law enforcement was involved in the incident.
The only person in the big rig was the driver, who sustained moderate injuries, the highway patrol said.
Multiple survivors were taken to area hospitals, hospital officials said. Those injured range in age from 16 to 55, the highway patrol said.
Some patients suffered life-threatening head injuries, chest injuries and fractures, hospital officials said.
The crash was near Holtville in Imperial County, which is about 125 miles east of San Diego and about 10 miles from the Mexico border.
Imperial County Fire said 25 additional personnel were sent to the scene, including four to five additional ambulances and four air helicopters.
Editor's Note: The number of deaths have been adjusted following a new press conference by the California Highway Patrol.
ABC News' Jenna Harrison and Alyssa Pone contributed to this report.