Fifth victim dies following shooting at Halloween party in California; police ID deceased

Update 3:01 a.m. EDT Nov. 2: A fifth victim has died following the Orinda Halloween shooting, authorities confirmed late Friday.

The Contra Costa County Sheriff's Office identified the fifth victim as Oshiana Tompkins, 19, of Vallejo/Hercules, KABC reported.

Earlier in the day, the sheriff's office identified the four men who died in the immediate aftermath of the shooting, KION reported. Those victims are identified as:

Update 12:50 p.m. EDT Nov. 1: Police said more than 100 people were at a party Thursday night in Orinda when shots rang out around 11 p.m., leaving four people dead and several others injured.

Officials with the Contra Costa Sheriff's Office said it remained unclear Friday morning how many people were injured, as some victims went to hospitals on their own.

Thursday night's deadly shooting happened at a home that had been rented through Airbnb, according to multiple reports. The home's owner, Michael Wang, 58, told the San Francisco Chronicle a woman had rented the house for what she claimed was going to be a family reunion.

"We realized (there were more people) when we got a call from the neighbors," Wang told the Chronicle. "We sent a message to the lady. My wife sent her messages to tell her that the house should only have a maximum of 12 people and no party allowed. They sent a message that we only have 12 people. But we have a Ring, a camera at the door, and we saw there were more people than that. We could not count, but it looked like more than that."

In a statement obtained by KRON, a spokesperson for Airbnb said the company has taken action to block the person who rented the home from booking another house on its platform.

"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," the statement said.

"Our thoughts are with the loved ones of the victims of this abhorrent act as well as the neighbors of the home."

Update 8:45 a.m. EDT Nov. 1: Officials with the Contra Costa Sheriff's Office confirmed Friday morning that four people were killed and several injured in Thursday night's shooting in Orinda.

Witnesses told KNTV shots rang out around 11 p.m. at a home that was being rented through Airbnb. Authorities continue to investigate.

Original report:  According to station, an unconfirmed number of other guests were wounded, but their conditions are not known.

Witnesses at the scene told KNTV the shooting happened about 11 p.m. during a Halloween party at an Airbnb rental.

Meanwhile, a neighbor of the Lucille Way home where the shootings took place told KTVU he heard gunfire coming from the house and later spoke with the owner who confirmed the home was being rented for a private party.

Please check back for updates to this developing story.