Police said Monday they do not believe the weekend death of a motorist was connected to a monthlong string of other Southern California freeway shootings.

The latest shooting occurred Sunday along the 101 Freeway in the San Fernando Valley, where police found driver Mario Gordillo Sical, 20, in a crashed sedan with a gunshot wound to his head.

Police Officer Sara Faden said authorities were investigating the shooting but did not think it was connected to any previous cases.

The shootings have made some drivers concerned about road rage.

"I have to be careful, maybe not cut in line. Or if someone does something, I shouldn't honk my horn," Lize Park, 50, said at a gas station near a 101 Freeway off-ramp.

Another case occurred late Saturday about 30 miles away in Long Beach, when a man was shot in what the victim called a road-rage incident. He was hospitalized with injuries that were not life-threatening.

On Feb. 27, a 46-year-old man was shot in the upper body and right arm while driving on the 210 Freeway northeast of Los Angeles. He survived.

A co-worker of that victim was arrested two days later and charged with attempted murder, Azusa police Detective DeWayne Eldridge said.

In another incident, a 26-year-old man died after a March 1 shooting on the 101 Freeway in the San Fernando Valley that followed an argument on Hollywood Boulevard.

A 54-year-old woman was found about two weeks later shot in the head in a car crashed on the San Bernardino Freeway in eastern Los Angles County. She died at a hospital.

It was not known if arrests had been made in those shootings.

In a separate case, the California Highway Patrol said Monday it is investigating a series of apparent BB gun attacks that shattered rear passenger windows of six vehicles on Interstate 10 in eastern Los Angeles County, near the town of Baldwin Park. No one was been injured in those attacks, in a 15-minute span during the Monday morning rush hour.