Thousands of Russian protestors have gathered across the country in support of the opposition leader, Alexei Navalny.
They are demanding Navalny's release after two weeks spent in a prison near Moscow.
Over 4000 people have been arrested across the country in violent clashes with police.
Among them is Navalny's wife, Yulia Navalny, who has also been arrested.
Moscow correspondent Stuart Smith speaks to Susie Ferguson.
