The German Foreign Office summoned the Russian ambassador on Monday over the death of Alexei Navalny, as the Kremlin continues to crack down on the opposition leader’s mourners and his body has yet to surface. The diplomatic slap comes as Russian authorities, which have yet to release the body of the dissident to his mother and lawyers – or produce an autopsy report – detain people laying flowers or otherwise commemorating the opposition leader. In St Petersburg more than 199 people were ordered either detained or fined and 154 were placed in a holding cell, most for several days. There have b…