Several People Killed in Santa Barbara Drive-By Shooting

Investigators search for motive in shooting that left several victims, gunman dead.
2:43 | 05/24/14

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Transcript for Several People Killed in Santa Barbara Drive-By Shooting
We want to get straight to the terrifying and really mystifying story breaking overnight. Police in Santa Barbara, California, dealing with four separate crime scenes right now in a bustling area filled with shops and restaurants. Authorities are calling the bloody attacks a planned mass killing and now looking at a chilling video they think is connected to the investigation. Bazi kanani is with the latest developments. Bazi. Good morning, Dan. Good morning, bianna. Investigators told us what they know about the mass shooting. At 9:30 in the evening in a neighborhood packed with students at the time. Breaking overnight, the sheriff calling it a planned mass murder. The shooting rampage left seven people dead including the suspect and hospitalized seven more. The suspect is dead. Reporter: The sheriff confirming this cryptic youtube video promising Rhett bugs and posted hours before the attack may provide H clues to the motive. Tomorrow is the day of retribution. The day in which I will have my revenge. That videotape includes the title retribution? We're investigating to determine that at this time. It would appear that that is connected with this crime. Reporter: Police responded immediately to frantic calls to students who were dropped in their homes when the shots rang out. From the time we got the first 911 calls until the time the suspect was determined to be dead at the scene was ten minutes. Reporter: Residents were advised to stay in their homes for hours as deputies worked to control the chaotic scene. Students posted the horrific moments to Twitter. The Santa Barbara sheriff's department says they're still piecing together the events from last night. I also want to let the families of the victims know that our hearts go out to them at this tragic time. Reporter: The person speaking in that youtube video, which again sheriffs confirm is linked to the attack, mentioned in the video he wants revenge for girls rejecting him and for popular kids not accepting him. At this time we know seven people have been killed, including the suspect. Another seven were hospitalized. We don't have an update on their conditions. We'll learn more throughout the morning and day. Dan, bianna. Another senseless shooting on a school campus. We'll follow the latest throughout the day here on ABC and

This transcript has been automatically generated and may not be 100% accurate.

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