Officials in California are reporting that 13 people are dead and several others have been injured after a semitruck and an SUV collided.

The incident occurred just 11 miles North of the U.S.- Mexican border around 6:15 am, Tuesday.

Authorities say the SUV was carrying 27 people at the time of the crash, though the vehicle was made to legally fit around eight or nine people. 12 of the victims died at the scene, while one died at the hospital. The other victims were flown and driven to various hospitals for treatment on fractures and head trauma.

Officials say they are still investigating the cause of the crash, however, CHP officer Jake Sanchez told reporters that he believes the SUV stopped at the intersection before it drove directly into the path of big rig. The truck then struck the left side of the SUV and appears to have pushed it off of the road.

Authorities also reported that the immigration status of those in the vehicle are currently unknown but they are working to validate the status of all those involved.

” It was an unusual number of people in an SUV, but we don’t know who they were,” Customs and Border Protections spokesperson Macario Mora said. “They could have been farm workers.”