"We are deeply concerned by the detention of peaceful protesters...
At least half an hour after Navalnaya wrote on social media that she had come to take part in the rally…
Earlier, the opposition figure's supporters had posted—on the Internet—calls for unsanctioned rallies in Russia on Saturday…
Nearly 5 thousand people are taking part in the protests...
All the detainees are men and youth…
And a march in support of the opposition figure will get underway in Irkutsk city…