FRESNO, Calif. (AP) _ Four adults and two children injured in a deadly bus crash in Central California filed a lawsuit Wednesday against Greyhound Lines Inc.

The horrifying wreck killed six people and injured nearly two dozen others when the bus slammed into an overturned SUV on July 22 on a busy state highway in Fresno.

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The suit filed in Sacramento County Superior Court alleges the bus driver did not fulfill his duty to transport the passengers safely. It said the company should pay damages to those injured or killed in the crash or their relatives.

“What started as a simple trip from L.A. to my home in Sacramento has turned into a life-altering nightmare,” Maurice Campbell, 37, of Sacramento, a plaintiff in the case, said in a prepared statement. “The doctors haven’t figured out yet what they will need to do to get me back on track.”

Greyhound spokesman Timothy Stokes said he had not yet seen the suit and could not comment.

The bus, carrying 31 passengers bound from Los Angeles to Sacramento, struck the SUV, skidded into a concrete center divider and clipped another vehicle before careening off the highway and hitting a eucalyptus tree.

The cause of the crash remained under investigation.

The suit also names the driver of the SUV that had overturned and blocked both lanes, as well as the driver of the other vehicle.

Plaintiffs’ attorneys said their clients have suffered orthopedic and head injuries, and the two children they represent are experiencing severe emotional distress.