Human chain protest targets Vladimir Putin

A woman stands on a bridge across the Moskva river during an opposition protest in which demonstrators linked hands in Moscow Photograph: Sergey Ponomarev/AP A woman waves a white ribbon at people standing along the Garden ring road in Moscow Photograph: Sergey Savostyanov/AP People brandish white ribbons from a car window in support of protesters. The White Ring protesters built a human chain along the Garden ring road Photograph: Grigory Dukor/Reuters Police officers detain a protester during the White Ring demonstration Photograph: Ivan Gushchin /Reuters An opposition supporter makes a chain of snowmen Photograph: Ivan Gushchin/Reuters Photograph: Ivan Gushchin /Reuters Police officers block the central square next to the Kremlin Photograph: Alexander Zemlianichenko Jr/AP White Ring protesters gather in Moscow Photograph: Grigory Dukor/Reuters Garry Kasparov, Russian opposition leader and former world chess champion, centre, stands in front of the Russian foreign ministry Photograph: Alexander Zemlianichenko Jr/AP A protester holds a cat with a white ribbon in Moscow Photograph: Sergey Savostyanov/AP Protesters carry a caricature of Putin during a protest rally in St Petersburg Photograph: Dmitry Lovetsky/AP A man holds a poster depicting Putin wearing a crown, reading 'Down with autocracy', in St Petersburg Photograph: Anatoly Maltsev/EPA