Sergei died here in the modest conservatory of his family home; a ground floor flat in Ukraine's second city of Kharkiv. His mother, Nadezhda Aleksandrova, stands next to his body - his head circled by a pool of blood and broken glass. Shrapnel has sprayed past the daffodils and into the apartment on Freedom Street, ending Sergei's life at the age of 38. He was smoking by the window when it hit. Russian President Vladimir Putin called off his northern offensive to take the capital of Kyiv at the end of last month. But the invasion has refocused on the eastern flank of Ukraine, intensifying the Russia-backed separatist campaign waging here since 2014. Authorities say seven people were killed and 42 injured because of bombings. CONTENT WARNING: DEATH, BLOOD IMAGES AND SOUNDBITES