Updated Saturday, Nov. 2 at 8:53 a.m.
A shooting during a Halloween party Thursday night at a home in Orinda rented out on Airbnb has left five people dead and at least three more injured.
Contra Costa Sheriff announced Friday night that 19-year-old Oshiana Tompkins from the Vallejo-Hercules area was pronounced dead at a local hospital.
The sheriff's office earlier Friday identified the other victims as 22-year-old Tiyon Farley of Antioch, 24-year-old Omar Taylor of Pittsburg, 23-year-old Ramon Hill Jr. of San Francisco and Oakland, 29-year-old Javin County of Sausalito and Richmond and 19-year-old Oshiana Tompkins of Vallejo/Hercules.
Contra Costa County Sheriff's Office spokesman Jimmy Lee said Orinda police officers were dispatched to the 100 block of Lucille Way, which is near Knickerbocker Lane, at about 10:50 p.m. Thursday following reports of the shooting.
"We are looking for a suspect," Lee said in an email.
Orinda Police Chief David Cook said in an afternoon press conference that he could not confirm how many suspects were involved in the shooting. Cook called the scene "chaotic," and said more than 100 people fled the residence when the shooting occurred.
He said the investigation is complex, with a lot of people involved. Cook added he wasn't releasing any witness statements at this time.
The chief said three apparent gunshot victims were pronounced dead at the scene. Two more victims were taken to the hospital but later died.
Another victim is in stable condition at Highland Hospital in Oakland.
Chris Gade, who lives with his family near the house where the shooting took place, said it sold about two years ago and has been rented out since then, mostly to regular short-term renters, and occasionally for parties. Gade said the house could fit about 50 people and last night, as the party was ramping up, people were spilling out into yard.
"We didn't hear the gunshots ourselves, but most of the neighbors started frantically texting," Gade said. "My wife is the one that heard my phone going off constantly. And yeah, pretty much the whole neighborhood ran to their doors and locked things just to make sure that everything was safe."
Gade said "everybody moved to Orinda for the same reason."
"We're here because we want the quiet, we want the family-oriented neighborhood," he said. "So this type of thing definitely jars everyone out here."
Ben Breit, spokesman for Airbnb, wrote in an emailed statement to KQED that the shooting occurred at a residence listed on the home rental site.
"We are horrified by this tragedy and are in close communication with Chief David Cook of Orinda Police to offer our support with his investigation into who committed this senseless violence," Breit said. "We have taken action to ban the booking guest from our platform. Our thoughts are with the loved ones of the victims of this abhorrent act as well as the neighbors of the home."
He wrote that the party "was unauthorized by the host, as the listing’s house rules specifically banned parties."
Orinda City Manager Steve Salomon said at a Friday press conference that a maximum of 13 people were allowed at the short-term rental. Salomon said Orinda requires short-term rentals to register with the city and indicated this one was registered.
Salomon said the city had previously received two complaints about the residence, one regarding noise and the other regarding trash containers.
Orinda Mayor Inga Miller said the City Council will discuss the issue of short-term rentals at a Tuesday meeting.
Hayden Aitchison, a senior at Miramonte High School in Orinda, said her friends attended the party. She said she saw the invite for the "AirBnB Mansion Party" and considered going, but did not attend.
"Things just kind of turned south. I'm not really sure why or what was affiliated with it," Aitchison said. "But all I know is my friends are OK."
Police and sheriff's deputies have cordoned off the shooting area. Lee said the forensics division of the sheriff's office and detectives from the homicide unit responded to the scene. An investigation is ongoing. The FBI is in touch with the sheriff's office and will provided assistance if needed, FBI spokeswoman Katherine Zackel said.
KQED's Raquel Maria Dillon and Kate Wolffe contributed to this report with information from Bay City News Service.
This is a developing story. Check back for updates.