(CNN) Airbnb is cracking down on unauthorized house parties after five people were shot and killed at a Halloween party at an Airbnb rental house, the company's CEO announced Saturday,

The company is banning "party houses," CEO Brian Chesky announced Saturday on Twitter, in reference to Thursday evening's shooting.

The company will be "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," he wrote. The shooting took place in Orinda, California, a town east of Berkeley in the San Francisco Bay Area.

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. Here is what we are doing: — Brian Chesky (@bchesky) November 2, 2019

In additional tweets, Chesky detailed the company's course of action. Anyone found in violation of the upgraded policies could be removed, he said.

"First, we are expanding manual screening of high-risk reservations flagged by our risk detection technology," he said. "Second, we are creating a dedicated "party house" rapid response team. Third, we are taking immediate action against users who violate these enhanced guest policies, including removal."

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