been placing flowers at a memorial dedicated to victims of political repression . the russian prosecutor s office has warned people against taking part in mass protest in the capital. that camera captured this moment a short time that camera captured this moment a short tim ., ., on the right of screen, a woman at the memorial unfurls a sign which is immediately snatched by police. the woman is then taken away by officers as people continue to lay flowers. you can just make that out there, that was the scene just a short time ago where people were laying flowers in moscow. us presidentjoe biden hasjust spoken about the death. here s some of what he said. make no mistake putin is responsible for navalny s death. putin is responsible. what has happened to navalny is yet more proof of putin s brutality. no one should be fooled not in russia, not at home, not anywhere in the world putin does not only target citizens of other countries, as we see with what s going on in u