Some 250 demonstrators gathered near the Russian embassy in Berlin on Sunday to protest at the death of jailed dissident Alexei Navalny, police in the German capital reported. The organizers had registered a protest by 450 people. Shortly before the protest called for the early afternoon, the Pussy Riot protest group announced its own demonstration. A police spokesman said that a number of people with pink hoods and banners had arrived at the embassy and left shortly afterwards. Pussy Riot, a Russian feminist protest and performance art group, issued a statement saying that the situation was d…