Airbnb said it would be banning party houses in response to a a mass shooting at a Halloween party in near Berkeley, California that left five people dead. The shooter is still at large. The party in Orinda, California was advertised as an “Airbnb Mansion Party” and attended by revelers in full costume, making it difficult to identify the suspect, police say. “What happened on Thursday night in Orinda was horrible. I feel for the families and neighbors impacted by this tragedy. We are working to support them,” Airbnb CEO Brain Chesky said in a tweet. The AP reports that the woman who rented the home lied to her Airbnb host, saying she was renting it so her asthmatic family members could escape wildfire smoke, citing sources familiar with the transaction. When police arrived at the scene, around 100 people in costume were running from the house. The latest victim has been identified as 19-year-old Oshiana Tompkins. The other victims are 22-year-old Tiyon Farley, 24-year-old Omar Taylor, 23-year-old Ramon Hill Jr., and 29-year-old Javin County, according to ABC News.