Location of jailed Russian activist Vladimir Kara-Murza unknown, say backers

Those who tried to visit or write to the journalist, who is serving a 25-year sentence, were unsuccessful

The prominent Russian opposition figure Vladimir Kara-Murza, who is serving a 25-year sentence for treason, has disappeared from the Siberian prison where he was behind bars, according to his supporters.

Kara-Murza, 42, was being held in a prison in the Omsk region, but a letter sent to him by the activist and journalist Alexander Podrabinek was returned with the notation that the inmate was no longer there, Podrabinek said on Facebook.