In August, Russia began limiting some calls on WhatsApp, owned by Meta Platforms, and on Telegram, accusing the foreign-owned platforms of refusing to share information with law enforcement in fraud and terrorism cases.

On Friday, the Roskomnadzor watchdog again accused WhatsApp of failing to comply with Russian requirements designed to prevent and combat crime.

“If the messaging service continues to fail to meet the demands of Russian legislation, it will be completely blocked,” Interfax news agency quoted it as saying.

WhatsApp has accused Moscow of trying to block millions of Russians from accessing secure communication.

Russian authorities are pushing a state-backed rival app called MAX, which critics claim could be used to track users. State media have dismissed those accusations as false.