LIVERMORE (CBS SF) — The California Highway Patrol confirmed Monday afternoon that the three freeway shootings around the Bay Area since Saturday all appear to be targeted attacks and are not related.

CHP made the announcement Monday during a press conference providing information on the investigation into the three separate shooting incidents.

READ MORE: Girl Fights Off Man Who Touched, Punched, Spit At Her In Milpitas Park

“None of these shootings appear to be related. That’s important to state. I know that was a question that come up earlier.” CHP Officer John Fransen with the Golden Gate Division.

In the first incident on Saturday afternoon, a 25-year-old Antioch woman died in a solo vehicle accident on eastbound Highway 4 near the Willow Pass Road interchange in North Concord, in Contra Costa County.

Bullet holes were discovered in the woman’s driver’s-side door after the accident. Destinee Shaharisha-Jenae Hillery, 25, of Antioch was pronounced dead at the scene Saturday.

Police believe the incident was gang-related.

A second targeted shooting happened Sunday evening when a passenger in a car on Interstate Highway 580 was shot and injured.

The 24-year-old woman was riding in a Honda Accord as it headed east on I-580 near the Isabel Avenue (Highway 84) interchange about 5:45 p.m. Sunday when she was hit in the leg by one bullet, said CHP Officer Tyler Hahn.

The Accord continued east about four miles to Vasco Road, where the driver stopped to call the CHP, Hahn said. The CHP called paramedics, who met them there and took the woman to Eden Medical Center in Castro Valley.

Hahn described the woman’s injuries as non-life-threatening. Hahn said there was no specific description of a suspect vehicle provided.

READ MORE: COVID: Youth Nights At Levi's Stadium Add A Dose Of Fun To Teens' Vaccines

On Monday morning at about 10 a.m., another shooting happened along Interstate 80. Shots were fired at a vehicle in Richmond near MacDonald Avenue. No one was injured in that incident.

The CHP is seeking suspects in all three cases. Investigators are gathering information from the ShotSpotter systems on Highway 4 and I-80 and say more cameras would help.

“It’s definitely a conversation that’s been had and we are seeing more camera systems that are out on the freeways,” said Fransen. “And we’ll see if the camera system in this case will help in investigating this incident

Since November 2015, there have been 185 shootings on Bay Area freeways killing nine people. CHP has only made 39 arrests in those cases.

Authorities say they need the public’s help in order to close more of these investigations.

“The witnesses are key to a lot of these cases,” said Fransen. “It’s important for people to realize that if we want to stop this that a lot has to do with people being able to come forward who have that information.

MORE NEWS: Transient Man Arrested In Fatal Assault At Walnut Creek Civic Park

© Copyright 2019 CBS Broadcasting Inc. and Bay City News Service. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.