The collision forced transportation officials to close I-10 near the border between the two states.
The accident occurred about 2:15 a.m. at a border inspection station east of Blythe, Calif., according to California Highway patrol officials.
The four dead were passengers on the bus, which is owned by El Paso-Los Angeles Limousine Express Inc. The bus service was en route from El Paso to Los Angeles via Phoenix.
At least 12 people were transported to hospital either by ambulance or helicopter.
The crash blocked both eastbound and westbound lanes of the highway, Arizona Department of Transportation spokesman Garin Groff said. Traffic was backed up for about one mile westbound Wednesday morning, he said.
Groff said drivers should expect long delays as traffic in both directions is detoured onto frontage roads to get around the crash on the California side of the border. Drivers should expect an extended closure Wednesday morning.
Comment: No doubt, a thorough investigation is underway regarding this horrific incident. The main focus will be an inspection of the big rig that jackknifed, to determine why this occurred.
Driver error? Mechanical malfunction? Poor maintenance? All of these issues need to be extensively investigated and a determination made. Under the Federal Motor Carrier laws, semi trucks are required to have no less than $750,000 in liability insurance.
Clearly, this minimum falls way short of appropriate coverage for this case. These types of crashes can be devastating to families.
This entire incident needs to be explored and investigated, to see to it that appropriate justice, compensation and/or penalties are assessed regarding all involved. Our thoughts and prayers are with those who lost their loved ones.