Brazil's telecommunications regulator said on Friday it was suspending access to Elon Musk's X social network in the country to comply with an order from a judge who has been locked in a months-long feud with the billionaire investor.

The popular social media platform missed a court-imposed deadline on Thursday evening to name a legal representative in Brazil, triggering the suspension.

Musk has argued that Supreme Court Justice Alexandre de Moraes was trying to enforce unjustified censorship, while the judge has insisted that social media needs hate speech regulations.

"They're shutting down the #1 source of truth in Brazil," Musk said in a post on X on Friday.

The judge's ruling could cause X to lose one of its largest and most coveted markets, at a time when Musk has struggled with advertising revenue for the platform.

X remained accessible in Brazil late on Friday, though some Brazilians posted on other platforms that their access to X was already being blocked. Three of the country's top telecommunications carriers said they would begin blocking access from midnight (0300 GMT on Saturday), according to a report by local news outlet UOL.

The feud has led to the freezing this week of satellite internet provider Starlink's bank accounts in Brazil. Starlink is a unit of Musk-led rocket company SpaceX.

In his ruling, Moraes ordered that X, formerly Twitter, be suspended in Brazil until it complied with all related court orders, including the payment of more than $3 million in fines, as well as the designation of a local representative, as required by Brazilian law.

Moraes also ordered telecommunications regulator Anatel to implement the suspension order.

The agency told Reuters it is proceeding with compliance, but without specifying a timetable.

To effectively close X in Brazil, telecommunication companies will need to stop carrying the network's traffic, while also preventing users of the site from dodging it by concealing their locations with virtual private networks, or VPNs.

Moraes ordered that those who continued to access X via VPNs be fined up to 50,000 reais ($9,000) per day.

Tech giants Apple (AAPL.O), opens new tab and Alphabet's Google (GOOGL.O), opens new tab were initially instructed to remove X from their app stores and implement so-called anti-VPN obstacles that would make it more difficult for users of Apple's iOS operating system and Google's Android to open the X app on phones or tablets.

But Moraes later reversed that part of his order, saying it would not be needed.