CAMARILLO, Calif. (KTLA) -- The driver accused of causing a crash that killed his four passengers pleaded not guilty Tuesday to manslaughter charges.

Rogaciano Ramirez-Lopez, 24, of Oxnard entered not-guilty pleas to four charges of vehicular manslaughter with gross negligence and denied enhancements alleging he committed a serious felony at his arraignment in Ventura County Superior Court.

Ramirez-Lopez is also is facing an immigration hold and is not eligible for bail.

Authorities have identified two of the four men killed in a head-on crash in Camarillo Monday.

The crash was reported around 6 a.m. on Pleasant Valley Road east of Las Posas Road, according to Ventura County fire officials.

Investigators say Ramirez-Lopez was driving a relative and 3 neighbors to work.

Five young men were heading east in a Toyota Camry when the driver made an unsafe pass, according to Camarillo police Sgt. Harold Hanley.

The driver of the Toyota lost control, spun into the path of a Cadillac in the oncoming lane and was broadsided, said Hanley.

The Toyota landed in a ditch on the side of the road.

Fire crews had to bring in heavy equipment to free the victims, who were trapped inside the wreckage.

It took 45 minutes to free everyone in the car.

Three people were pronounced dead at the scene.

The fourth died later at the hospital.

Ramirez-Lopez was seriously injured in the crash as was the driver of the Cadillac, 78-year old William Thomas Kimball.