Violent week on Bay Area freeways

BAY AREA (KTVU) - It has been a violent week on bay area freeways with three separate shootings involving drivers. 

In one incident it was road rage while another case appeared to be a targeted attack. 

On Thursday shots were fired along 580 near Canal Boulevard in Richmond. The CHP found shell casings but no shooting victims.
  
Authorities are continuing to search Friday in the East Bay for the shooter who opened fire on a man and woman as they were driving along 580 in Oakland on Wednesday afternoon. 

The two victims are still hospitalized in stable condition. 

Investigators have not revealed a motive, but they do believe the car was targeted. 

Some drivers say they're concerned about what's going on.

Also Friday morning, San Francisco police are searching for the driver who shot and injured another driver in what was likely a case of road rage.

Police say it happened late Wednesday night on the Fremont Street off ramp from the Bay Bridge.

One car rear ended another, and when the two drivers pulled over, one man pulled a gun and shot the other driver in the chest.

That victim is expected to survive.

Freeway shootings have become an ongoing issue on East Bay freeways. At least 3 dozen attacks have happened over the past year.