Elliot Rodger shooting: all victims were University of California Santa Barbara students

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Isla Vista: Santa Barbara County Sheriff's Department officials on Sunday identified the first three victims of the Isla Vista rampage, each found fatally stabbed Friday night inside an apartment not far from the University of California, Santa Barbara, campus.

Now, all the attacker's victims have been identified, and they were all UCSB students.

A sign advocating gun control is seen on a makeshift memorial for 20-year-old university student Christopher Michael-Martinez.Credit: Reuters

The latest names to be released - Cheng Yuan Hong, 20, of San Jose; George Chen, 19, of San Jose; and Weihan Wang, 20, of Fremont - were stabbed multiple times in unit No. 7 of a two-story, charcoal gray building on Seville Road. Authorities say 22-year-old Elliot Rodger attacked them before going on a rampage through Isla Vista, killing three more people before taking his own life.

Hong and Chen were Rodger's roommates. It's unclear whether Wang also was a roommate or was just visiting, officials said in a release. Finding their bodies inside the apartment was "a horrific crime scene," Sheriff Bill Brown said.

Two men kneel at a makeshift memorial after a killing rampage in Isla Vista near Santa Barbara.Credit: AFP

Hidden in Rodger's bedroom were three guns purchased legally from licensed dealers in Goleta, Oxnard and Burbank, authorities said. They said Rodger used the guns and his black BMW to wreak havoc across a square kilometre of the quiet college town - running down cyclists and skateboarders, shooting through shop windows and exchanging fire with officers.

At 9.30pm Friday, Rodger got in his car and drove to UCSB's Alpha Phi sorority house, where he banged aggressively on the door for more than a minute, officials said.

The events of the evening were unfolding just as Rodger had described in a 137-page diatribe and in multiple online videos, vowing to kill people quietly at his home, then go to a sorority house to "slaughter" women.

"Fortunately, no one opened the door" at the sorority house, Sheriff Brown said. But before leaving, Rodger shot three women on the front lawn. UCSB students Katherine Cooper and Veronika Weiss died. A third survived multiple gunshot wounds.

A man photographs a flower-filled bullet hole in the windows of the IV Deli in Isla Vista, California.Credit: AFP

According to authorities, Rodger then steered his BMW through the streets of Isla Vista, a community on the California coast, driving by a nearby deli and fatally shooting 20-year-old student Christopher Martinez.

Rodger eventually ran into the back of a Jeep and came to a halt, the right wheel well of his BMW on fire, the driver's door thrown open. Authorities found him dead inside the car.

At least one of Rodger's roommates had encountered issues with him before: In January, Rodger accused Hong of stealing three candles, valued at $US22 ($23.80), said Joyce Dudley, Santa Barbara County district attorney.

When Hong said he didn't know where the candles were, Rodger performed a citizen's arrest and called 911. Sheriff's deputies found the candles on Hong's bed. He was arrested and charged with a petty theft infraction.

Hong was a computer science student who grew up in Taipei, according to his Facebook page. He graduated in 2012 from Lynbrook High School in San Jose.

Los Angeles Times