Russian police raided the home of opposition activist Lyubov Sobol early on Friday and then took her in for questioning, Kremlin critic Alexei Navalny and his supporters 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 a botched plot to poison him in August.
The FSB has dismissed Navalny's allegations as a provocation.


Man charged with 10 counts of attempted murder after knife attack on UK train
Tanzania's Hassan sworn into office after deadly election violence
Powerful 6.3 quake kills at least 20 in Afghanistan, hundreds injured
Turkey set to call for action on Gaza as soon as possible, source says
