Scared Ukrainian children have been pictured being led down into metro systems to shelter from Russian shelling as air raid sirens sound in somber echoes of World War Two.
Russia launched a full-scale attack on its neighbour in the early hours of Thursday morning with a massed assault by land, sea and air which is the biggest by one state against another in Europe since 1945.
Attempts at diplomacy and threats of sanctions proved futile as Vladimir Putin announced that Russian troops would enter the east of Ukraine.
