A Dinuba man was killed in a vehicle rollover early Friday on Highway 99, south of Taylor Road, the California Highway Patrol reported.

The name of the deceased has not been released pending next of kin notification. He was 40-years-old.

It's unknown what time the accident happened. The wreck was reported by a passerby around 5:30 a.m. Friday and by that time the engine was cool to the touch, according to the CHP.

The man was driving a 2006 Ford sedan southbound on Highway 99 in an unknown lane. For a reason that remains unknown, the man allowed the vehicle to veer to the right, off the highway.

The vehicle traveled in a southwesterly direction down a dirt ditch, through a barbed wire fence before overturning and coming to a stop on its roof in an orchard.

Once the accident was discovered and reported, emergency personnel rushed to the scene and found the man had sustained significant injuries. He was pronounced deceased at the scene.

The man was wearing a seatbelt, the CHP reported.

At this time, it is unknown if drugs or alcohol played a role in the crash.

The investigation is ongoing.