Navalny says Russian police have raided home of ally pursuing novichok plot

Kremlin critic says Lyubov Sobol detained after visiting Konstantin Kudryavtsev, the FSB agent tricked into speaking about poison plot

Russian police raided the home of opposition activist Lyubov Sobol early on Christmas Day and took her in for questioning, Kremlin critic Alexei Navalny and his supporters have said.

Navalny's supporters said they thought the police action was a response to her trying to knock at the door of an alleged FSB security agent in Moscow who Navalny says took part in the botched plot to poison him with novichok in August.