Billionaire Tesla CEO and Trump ally Elon Musk allegedly pressured the CEO of social media platform Reddit to stifle users criticizing him or President Donald Trump, leaving platform moderators furious.

In over 100 Reddit communities, moderators began banning links to social media platform X after Elon Musk appeared to perform a Sieg Heil at an inauguration rally for the 47th President. Musk responded by complaining about this response publicly on social media.

However, the billionaire had had a private reaction to the fiasco as well, messaging Reddit CEO Steve Huffman about his online critics and encouraging Huffman to silence them, reported The Verge.

They exchanged messages just before the subreddit r/WhitePeopleofTwitter was given a temporary ban for 72 hours, seemingly because its content included violent threats levied against members of the Musk-led Department of Government Efficiency. The exact messages exchanged by Musk and Huffman have not been revealed.

Subreddits banning X links included r/Nintendo and r/NFL and even r/Military, the moderators of which said “F— that guy,” about Musk in a statement.

A spokesperson for Reddit clarified that users were implementing these bans themselves, and that they had nothing to do with the company itself.