A Twitter spokesman told a US tech news website the bans were related to the live sharing of location data.
Melissa Fleming, the UN’s under secretary general for global communications, said she was “deeply disturbed” by reports that journalists were being “arbitrarily” suspended from Twitter.
“Media freedom is not a toy,” she said. “A free press is the cornerstone of democratic societies and a key tool in the fight against harmful disinformation.”
Earlier on Friday, EU commissioner Vera Jourova threatened Twitter with sanctions under Europe’s new Digital Services Act which she said requires “the respect of media freedom and fundament rights”.
“Elon Musk should be aware of that. There are red lines. And sanctions, soon,” she added.
Mr Musk has not commented directly on the suspensions, but said in a tweet that “criticising me all day long is totally fine, but doxxing my real-time location and endangering my family is not”.
He also tweeted that accounts which he claimed engaged in doxxing – a term to describe to the release of private information online about individuals – receive a temporary seven-day suspension.
“Same doxxing rules apply to ‘journalists’ as to everyone else,” he added.
A spokesman for the New York Times called the suspensions “questionable and unfortunate”.