In an unprecedented move, Monday Elon Musk fired Twitter's entire board of directors just a week after successfully finalizing the USD44 billion takeover.

Tesla, Inc. CEO Elon Musk was the only person left on Twitter's board, following a mass resignation of seats.

"This is just temporary," Musk said after firing Tesla's top executives.

Among those who've been fired are Chief Executive Officer Parag Agrawal, Chief Financial Officer Ned Segal, and former Chairman Bret Taylor.

In a SEC filing, it was reported that Musk, the world's richest person, offered to buy back all of Twitter's outstanding bonds.

Saudi Prince Alwaleed bin Talal had become the second-largest shareholder of Twitter in a separate Securities and Exchange Commission document. Senator Chris Murphy from Connecticut was concerned over the issue.

"I am requesting the Committee on Foreign Investment to conduct an investigation into the national security implications of Saudi Arabia's purchase of Twitter," tweeted Murphy.

"We should be concerned that the Saudis, who have a clear interest in repressing political speech and impacting U.S. politics, are now the second-largest owner of a major social media platform," Murphy said. "There is a legitimate national security issue at stake, and CFIUS should do as review."

Over the years, there has been a lot of debate about the tension between free speech and online harm. This is relevant right now given Elon Musk's recent purchase of Twitter and his critique of the company's moderation policies that he himself has criticized in the past.

Though Elon Musk has not yet revealed his specific plans for the future of Twitter, he is widely expected to make some changes to moderation rules and staff.

He is also thinking about letting people buy the "blue check" mark to prove their authenticity. This is a symbol that you'll see on verified accounts of famous people, politicians, business leaders, and journalists.