UPDATE (4:30 p.m.) - In a press release, CHP says a 2006 Lincoln Navigator was going about 65 mph northbound on Highway 101 south of SR-58 around 10 a.m. Sunday with five people in the car.
According to CHP, the driver, 49-year-old Octovio Toledo-Hernandez of Santa Maria, lost control for unknown reasons and hit a tree adjacent to the shoulder.
One of the passengers, 51-year-old Maria Guadalupe-Toledo, suffered major injuries and was pronounced dead on scene, according to officials.
CHP says she was properly wearing her seat belt while sitting in the right seat of the second row.
The driver and three other passengers were transported to Sierra Regional Medical Center for treatment.
In the press release, one of those passengers, a one-year old boy, had no injuries, but was still taken to the hospital for evaluation.
UPDATE (12:10 p.m.) - CHP officials say a 51-year-old female has died in a single-vehicle collision Sunday morning.
Authorities say four other people have been transported to a hospital. Officers are unable to confirm the severity of their injuries.
The woman who died was wearing her seat belt at the time of the incident, officials said.
Officials are continuing to investigate what led up to the collision.
ORIGINAL STORY (10:35 a.m.) - The California Highway Patrol is responding to a fatal collision on Highway 101 northbound and Highway 58 northbound off-ramp in Santa Margarita Sunday morning.
Officials said there is one vehicle involved and one person has died in the collision.
Authorities could not confirm any other details.
This is a developing story. Check back later for updates as more information becomes available.