Two people lost their lives in two separate collisions on Highway 99 in Turlock on Sunday, the California Highway Patrol reported.

The first incident was a single vehicle collision reported at 2:30 a.m. Sunday on northbound Highway 99, north of W. Monte Vista Avenue.

The deceased was identified as Luis Rudolfo Mojarro, 29, of Galt by the Stanislaus County Coroner’s Office.

Mojarro was driving a 2002 Chevrolet Tahoe. He had one passenger - Fernando P. Herrera, 21, of Lodi - in the vehicle.

The Tahoe was headed northbound on the highway, when for an unknown reason, Mojarro turned the vehicle to the right.

The sudden change of direction caused the Tahoe to leave the eastern road edge and overturn down an embankment, the CHP reported.

Mojarro was not wearing a seatbelt and was ejected from the Tahoe as it overturned. He was located by emergency responders on the Monte Vista Avenue on-ramp. He was rushed to a nearby hospital, where he died from his injuries.

The Tahoe came to a rest on its roof and Herrera, who was wearing a seatbelt, had to be extricated from the vehicle. He was transported to an area hospital with major injuries that included multiple broken bones and a possible skull fracture.

The collision remains under investigation and it has not yet been determined if drugs or alcohol were factors in the crash.

The second fatal collision was reported at 1:40 p.m. Sunday on southbound Highway 99, at the W. Taylor Road off-ramp.

The deceased was identified by the coroner’s office as Cesario Nepomuceno, 22, of Merced.

Nepomuceno was trying to run across the highway when he was struck by a 2003 Lincoln Town Car.

The Lincoln was driven by Humberto Gonzalez, 38, of Turlock. There also was a 17-year-old male passenger in the vehicle.

According to the CHP, Nepomuceno was attempting to cross from the west side of the highway to the east. He ran in an easterly direction across the number 3 and 2 lanes, narrowly avoiding being struck by other vehicles.

He continued running east into the number 1 lane, directly into the path of the southbound Lincoln, which was traveling at approximately 70 miles per hour.

Gonzalez attempted to avoid the collision by hitting his brakes and turning to the left.

The right front of the Lincoln struck Nepomuceno and propelled him into the air. He landed on the asphalt in the center median, the CHP reported. He was pronounced deceased at the scene.

Neither Gonzalez or the 17-year-old boy reported any injuries.

The investigation is ongoing and at this time it is unknown if drugs or alcohol were factors in the collision.