Russia has threatened to block access to the Telegram messaging platform unless the company that runs the app provides more information about itself.
The head of communications regulator Roskomnadzor, Alexander Zharov, said repeated efforts to obtain the information had been ignored by the company and warned that "time is running out" for the app.
Telegram's non-response appears to be down to the repercussions of handing over the requested details: Doing so would effectively add it to the state regulators' registry, which would require it to retain users' chat histories and encryption keys and share them with authorities if asked, according to Russian news agency TASS.
According to the group's policy, it can only be forced to hand over data if "an issue is grave and universal enough to pass the scrutiny of several different legal systems around the world"