Ukraine has launched a major drone attack on numerous Russian regions as tensions mount between the two countries over ceasefire plans for Russia's upcoming Victory Day celebrations.The assault came after Moscow disregarded Kyiv's proposal of a ceasefire that was meant to begin on Tuesday, local time, and launched a fresh round of attacks.Russia's defence ministry said on Thursday that the country's air defences had shot down 347 Ukrainian drones overnight in 20 different regions, including in Moscow.That represented Ukraine's second-biggest aerial attack of the war so far, after a similar-scale drone assault in March.Dozens more drones were also launched during the day, the Kremlin said, with nearly 100 flights in and out of Moscow's three major airports delayed or cancelled by midday.The attacks came ahead of Russia's most important secular holiday, Victory Day, which marks the anniversary of the defeat of Nazi Germany in World War II.Russian authorities have declared a unilateral ceasefire in Ukraine for Friday and Saturday Ukraine responded to that with its own suspension of hostilities from midnight Tuesday, local time.But Ukrainian President Volodymyr Zelenskyy said Moscow disregarded the goodwill gesture and launched fresh attacks."Russia has not stopped any type of its military activity