Elon Musk has threatened to walk away from his $44bn takeover of Twitter, accusing the social media company of "thwarting" his requests to learn more about its user base.
In a letter filed with regulators, Musk says he was entitled to do his own measurement of spam accounts.
The letter formalises a dispute that has simmered for weeks after Musk declared the deal "on hold" pending further information.
Twitter has defended its estimates.
But Musk believes spam and fake accounts represent a far greater share than the less than 5% of daily users that Twitter reports publicly.
The dispute has raised more doubts about the future of the takeover, which Twitter's board approved in April.
Stay tuned for the latest news on our radio stations
