Kara-Murza's wife, 'now I fear for my husband's life' - Last hour. Kara-Murzza has long been a critic of Russian President Vladimir Putin.

He has survived two poisonings since 2015, which left him with a form of nerve disease called polyneuropathy. There has been no news of him for weeks, since, according to his wife's complaint, he disappeared from the IK-6 penal colony in Omsk, Siberia, where he was serving his sentence.