Police officers detain a man laying flowers to Alexei Navalny at the Memorial to Victims of Political Repression in St. Petersburg (Picture: AP) Russian police are detaining people for leaving tributes to Vladimir Putin’s fiercest foe Alexei Navalny who died on Friday. More than 100 people have been detained across eight cities after leaving tributes, according to OVD-Info, a group which monitors political repression in Russia. Navalny, 47, di…