"When the second half of the year comes to an end, I set a deadline for me on December 15, I will write a letter: tell me where this data is stored. They will answer something to me. I will do the same regarding Facebook," Roskomnadzor head Alexander Zharov told reporters.
The official addressed a letter Twitter had sent to Roskomnadzor which was stating that in the second half of 2018 the company would localize the data of Russian users on the territory of the country.
These measures are connected to the amendments to the legislation on personal data protection in effect since September 1, 2015, requiring foreign companies operating in the country to store the data of the Russian users within the Russian borders. Roskomnadzor has the legal authority to ban the companies, which can't comply with the law.