Former 21st Century Fox chief executive James Murdoch, the son of media tycoon Rupert Murdoch, has resigned from News Corp's board citing clashes over editorial content, US regulators said.
The 47-year-old once seen as his father's successor has been openly critical of some media coverage from publishing empire News Corp's outlets in recent months.
According to a letter written by James Murdoch and released Friday by the US Securities and Exchange Commission (SEC), his resignation was due to "disagreements over certain editorial content published by the company's news outlets and certain other strategic decisions".
News Corp owns the Wall Street Journal, the New York Post, The Times and the Sun newspapers among others, but not Rupert Murdoch's Fox News network.
James Murdoch's decision reinforces his disengagement from the family media empire, which grew from a newspaper group in Australia.
In January, he denounced the climate change skepticism of some Murdoch media, citing coverage of the fires which devastated large parts of Australia.
In a statement, widely reported by US media at the time, Murdoch and his wife spoke of their "frustration" with some of the News Corp and Fox coverage, adding that they were "particularly disappointed with the ongoing denial among the news outlets in Australia given obvious evidence to the contrary."
Rupert Murdoch has said he does not employ climate change deniers, and has previously described himself as a climate "sceptic".
The pair have also diverged politically.
While Rupert Murdoch has been a longtime supporter of Republican President Donald Trump, his son has reportedly donated hundreds of thousands to Democrat challenger Joe Biden's 2020 campaign.
James Murdoch, who headed 21st Century Fox until he stepped down last year when Disney acquired most of the group's assets, has launched his own private holding company called Lupa Systems, which has taken a stake in Vice Media.
"We're grateful to James for his many years of service to the company. We wish him the very best in his future endeavors," said Rupert Murdoch, executive chairman of News Corp and James's brother Lachlan Murdoch in a statement.
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