Elon Musk is a Twitter owner who calls himself a “twitter owner”. “free speech absolutist,” He has fired employees from company who criticize him publicly on social-media.

Musk made the announcement in one case via Twitter. Another case was that of a former employee who claimed he was fired because he had openly rebuked Musk.

Engineer Eric Frohnhoefer, who worked on Twitter’s app for the Android mobile operating system, on Sunday reposted one of Musk’s tweets with a comment, saying that Musk’s understanding of a technical part of Twitter’s app was “wrong.” Musk responded and asked Frohnhoefer for more information, before writing. “Twitter is super slow on Android. What have you done to fix that?”

After attempting to explain his thinking in a number of tweets, Frohnhoefer was asked by another user why he hadn’t shared his feedback with his new boss privately. The engineer, who worked for Twitter for eight years, answered, “maybe he should ask questions privately. Maybe use Slack or email.”

Musk tweeted Monday morning that Frohnhoefer had been fired. Frohnhoefer shared the post via Twitter and added a saluting This is the emoji many employees used to send when they were fired earlier this month. Twitter and Frohnhoefer didn’t immediately respond to requests for comment on his status.

Ben Leib was fired as well after calling out Musk. He was fired. retweeted Musk’s technical post, written in the same format. “As the former tech lead for timelines infrastructure at Twitter, I can confidently say that this man has no idea wtf he’s talking about.” Bloomberg received confirmation from Leib that he was fired Sunday after he worked for Twitter for 10 years.

Since Musk’s takeover late last month, Twitter has been in chaos. Musk’s sudden departure from Twitter has upset many workers. fired half of the company’s 7,000-plus employees, including most of the senior managers, within about a week of his $44 billion buyout.

The corporate culture was also changed rapidly by the billionaire. While it wasn’t previously routine for employees to challenge leadership publicly at Twitter, workers often spoke out on internal Slack channels and by email before Musk showed up, sometimes posting criticism or concerns to the entire company.

Musk’s changes have led to a lack of communication internally in terms of who is in charge and what the company’s priorities are, current and former staffers say.

There are also concerns that Twitter’s San Francisco headquarters could be vulnerable to product malfunctions or technical problems. Twitter added another feature Monday. coding freeze, halting product updates to the app, and employees weren’t given a clear reason why.

Register for the Sunday Review Features email list so you don’t miss our biggest features, exclusive interviews, and investigations.