Navalny's widow says he was poisoned in Siberian prison - CNN

The widow of Russian opposition leader Alexey Navalny says he was poisoned in a Siberian penal colony. Yulia Navalnaya says that tests of smuggled samples were carried out by two separate overseas laboratories, and that both reached the same conclusion. Kremlin spokesperson Dmitry Peskov said during a press conference Wednesday that he was "unaware" of the claim.

CNN correspondent Clare Sebastian reports from London.