The Russian government has demanded that Twitter store the data of its Russian users on servers hosted in the country, a sudden change of tack that could vastly complicate the company’s relations with regulators in Moscow and lead to its being blocked in the market.
http://www.ft.com/cms/s/0%2Fe04e035c-87c6-11e5-90de-f44762bf9896.html#axzz3rMWimPUy