Uber's Chief Legal Officer Tony West ordered a probe into the way she handles discrimination reports after a group of whistleblowers threatened to go public with their complaints if the company doesn't take action. The group, who told Reuters that they're Uber employees of color, also accused Hornsey of using discriminatory language against the company's Global Head of Diversity and Inclusion Bernard Coleman. They claimed that she threatened former executive Bozoma Saint John, who joined the company from Apple Music with the intention of fixing its internal cultural issues, as well.

In the email she sent to her team, Hornsey said her resignation might come "a little out of the blue" for some people, but she has apparently "been thinking about [it] for a while." Khosrowshahi also sent a company-wide email about her resignation, calling her "incredibly talented, creative, and hard-working."

Here's the email Uber CEO @dkhos sent to staff tonight about the departure of Liane Hornsey, head of HR, who was with Uber through much of its crisis post-Susan Fowler's blog post about harassment & discrimination at Uber pic.twitter.com/ZJtUVcwVIh — Caroline O'Donovan (@ceodonovan) July 11, 2018

Uber didn't disclose the probe's results, and West told the anonymous complainants that it has no intention to. "Serious allegations alone, even when they turn out to be unsubstantiated, can damage a person's career and reputation, implicating important due process, privacy and moral concerns," he wrote in an email to the whistleblowers, according to Bloomberg. "[W]e should keep in mind that the simple fact that we may not observe disciplinary action doesn't mean serious measures haven't been imposed, if and where appropriate."

Besides Hornsey, Uber confirmed it also lost Tina Lamers, its Head of Product for Advanced Technologies. The Advanced Technologies Group is made up of Uber's engineering team in charge of developing its self-driving vehicles.

Hornsey confirmed the departure to the Uber staff with the email below.