The person who confirmed the news for The Washington Post was familiar with Uber's action and spoke on the condition of anonymity to discuss a sensitive matter not yet announced publicly by the company.
The firings were among the first visible results of an investigation led by former attorney general Eric H. Holder Jr., who was hired by Kalanick after reports of widespread sexual harassment within the company, triggered by a blog post by former employee Susan Fowler in February.
In the post, Fowler, a site-reliability engineer, reported that her manager sent messages that she said made it clear "that he was trying to get me to have sex with him," but that Uber's upper management and human resources office declined to deal forcefully with her complaint.
Holder's investigation, which has produced a draft report on Uber's workplace culture that has not been publicly released, led to the discovery of specific cases of alleged sexual harassment. Those cases were referred to Perkins Coie to further investigate and resolve, leading to the firings outlined in Tuesday's staff meeting.
No names of fired employees or details of the alleged harassment have publicly emerged. Bloomberg reported that Perkins Coie reviewed 215 claims and took no action in 100 of those cases.