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The world's richest man, Elon Musk, has completed his $44bn takeover of Twitter and referenced himself as 鈥楥hief Twit鈥� on his Twitter page. US media say a number of the social media site's most senior figures, including the chief executive Parag Agrawal, have been fired.

Twitter took legal action against Mr Musk when he tried to back out of the purchase earlier this year. But he announced it would go ahead shortly before the dispute was due to go to court.

Elizabeth Dwoskin is the Washington Post's Silicon Valley Correspondent. She told Newsday: 鈥淗e鈥檚 the world鈥檚 richest man but he doesn鈥檛 have endless cash and it鈥檚 very expensive to run any kind of social media company particularly because Twitter has never been a profitable one鈥�he鈥檚...faced with the reality of owning this company that has struggled for 16 years to turn any kind of profits.鈥�

(Picture: Video grab posted on the Twitter account of billionaire Tesla chief Elon Musk on October 26th 2022 shows him carrying a sink as he enters Twitter's headquarters in San Francisco. Credit: Twitter account of Elon Musk / AFP via Getty Images.)

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