OAKLAND (KRON) — California Highway Patrol officials say the spate of freeway shootings in the East Bay are not random acts of violence.

In all, there have been 28 total shootings since November 2015.  Four people have been killed in the shootings.

“Evidence suggests these shooting appear to be gang-related with different gangs involved,” a CHP spokesman said during a press conference.

Authorities say that the shootings have been “extremely difficult to investigate as victims and witnesses” have refused to cooperate with investigators.

“Every act of violence committed by these criminals puts the people of California at risk. And in the case of freeway shootings, particularly, endangers innocent motorists,” the CHP spokesman said.

The CHP and local law enforcement agencies will be increasing their patrol of the I-80 corridor.

On Tuesday at around 9:16 p.m., one person was shot and hospitalized with a non-life threatening injury to the leg.  The victim was while traveling on eastbound I-80 near Hercules.

The suspect vehicle is described as a black Chevrolet El Camino with tinted windows, according to the CHP.

BY THE NUMBERS

Four people have been killed in the shootings since last year, and a dozen other people have been injured.  The shootings span five freeways in the East Bay, 15 of them in Interstate 80:

  • HWY 4 — Five Shootings
  • I-80 — 15 Shootings
  • HWY 242 — One Shooting
  • I-580 — Four Shootings
  • I-880 — Three shootings

Stay with KRON4 News for updates to this developing story.