Vladimir Putin suffered major blows from Ukraine with dramatic strikes on oil refineries, defence plants, a military airfield, and radar facilities. The hits came after Donald Trump moved nuclear submarines closer to Russia after threats of war with the US from senior official Dmitry Medvedev.In a dawn strike, a huge fireball explosion hit military-linked Novokuybyshevsk oil refinery in Samara region with mushroom-shaped flames rising into the sky.The plant supplies aviation fuel for Russian combat aircraft which have been used to strike civilians in Ukraine.