Update 9:20 p.m. EDT: Elliot Rodger, the alleged gunman who killed six people in a furious shooting rampage near the University of California, Santa Barbara, began his murderous spree by stabbing to death three people in his home, police said Saturday night, according to ABC News.

Also, it's been reported that Rodger wrote a 140-page memoir-manifesto at some point prior to his shooting spree that killed six. The memoir-manifesto can be read here.

Update 7:30 p.m. EDT: University of California President Janet Napolitano says a mass shooting in the community around UC Santa Barbara is "almost the kind of event that's impossible to prevent and impossible to predict," according to the Associated Press.

The former secretary of Homeland Security, who took over as head of the UC system in September, made her remarks following a commencement speech in Oakland on Saturday, a day after the rampage that authorities say left seven people including the gunman dead and seven others injured.

UC Santa Barbara says students were among the victims, the AP reported. Napolitano issued a statement saying she's "shocked and deeply saddened" by the shooting and sending thoughts and prayers "to the victims of this tragedy, their families and the entire Santa Barbara community." She says she's working with UCSB to help students and families, the AP added.

UC Santa Barbara Chancellor Henry T. Yang also commented, via @NBCNews: "We are horrified and deeply saddened by the tragic events in Isla Vista last night ... We grieve for the precious lives lost, and we share in the heartbreak of their families, friends, and classmates."

Update 2:18 p.m. EDT: YouTube has taken down the Elliot Rodger's video but the video has been reposted on LiveLeak and can be viewed below.

The Santa Barbara County sheriff's office reports seven individuals, including the suspect, were killed in an apparent mass murder near the University of California, Santa Barbara (UCSB) early Saturday morning. Seven additional individuals were treated for gunshot wounds and other injuries at local hospitals. The sheriff has yet to identify the alleged suspect but it is believed a YouTube video, entitled "Elliot Rodger's Retribution," may be linked to the mass murder. The shooting occured at 9:27 p.m. PDT (12:27 a.m. EDT).

According to the Santa Barbara County sheriff's office's statement on the shooting, "Seven people are dead, including a suspect, and seven people are wounded following a series of shootings in Isla Vista. The identities of those who were killed are not being released until next of kin notifications are made. Of the seven people in the hospital, all are being treated for gunshot wounds or traumatic injuries and at least one of the victims has undergone surgery."

The suspect's identity has yet to be publicly revealed, but the sheriff's office states they have made an initial identification and are currently looking at several pieces of evidence that may be linked to the UCSB shooting. Per the statement, "the deceased subject has been preliminarily identified but his name is not being released until a positive identification is made. It appears the suspect acted alone. The sheriff’s office has obtained and is currently analyzing written and video evidence that suggests this was a premeditated mass murder."

At a press conference discussing the UCSB shooting, Santa Barbara County Sheriff Bill Brown offered more details about the shooting, reports ABCNews. KYET-TV reports a semiautomatic handgun was recovered and the suspect was driving a black BMW. The suspect fired several shots from his vehicle which led to a shootout with police. The suspect was later found dead in his car with a gunshot wound to his head but it is unclear if the fatal wound was self-inflicted or occured during the exhange with the police.

Brown also discussed the video that is being analyzed by the sheriff's office. The video, "Elliot Rodger's Retribution" was uploaded to YouTube on May 23. In the seven-minute clip, the young man says, "This is my last video, it all has to come to this. Tomorrow is the day of retribution, the day in which I will have my revenge against humanity, against all of you." Rodger says he has had to deal with an "existence of loneliness, rejection and unfulfilled desires."

Rodger became active on YouTube on July 23, 2012, and would leave comments on several videos and favorite channels and users. Some of the comments refer to his being lonely and most of his videos involve Rodger driving around Santa Barbara. Several discuss his inability to find a girlfriend.