"Starting today, we are banning 'party houses' and we are redoubling our efforts to combat unauthorized parties and get rid of abusive host and guest conduct, including conduct that leads to the terrible events we saw in Orinda", Airbnb co-founder and CEO Brian Chesky said on Twitter.
According to Brian Chesky, to prevent such terrible accidents from happening again Airbnb should improve "manual screening of high-risk reservations flagged by our risk detection technology", establish a "dedicated 'party house' rapid response team", and take "immediate action" against violators of the company's policies.
"We must do better, and we will", the CEO concluded. "This is unacceptable".
The house was rented to a woman who said she was staging an event for a dozen people, owner of the rented house Michael Wang said to the San Francisco Chronicle.
According to the sheriff's department, they were reacting to a noise complaint at the house when the shooting started.
Three people were shot to death at the house, with two others passing away at a hospital, police said.