Russia's defence ministry said on Wednesday that Russian armed forces have captured the southern Ukrainian city of Kherson, RIA news agency reported. Ukrainian emergency service said 2,000 civilians have been killed so far. The Ukrainian ambassador to the United Nations compared Vladimir Putin to Hitler, before the UN General Assembly passed a historic vote on a resolution deploring Russian aggression in Ukraine.China, a major buyer of Russian oil and gas and the only major government that has refrained from criticising Moscow’s attack on Ukraine, said it will not impose financial sanctions.The war between Russia and Ukraine has entered seventh day on Wednesday, with a huge convoy of Russian tanks and armoured vehicles on a road to the capital, Kyiv, and fighting intensifying there and in other big cities. As per the Ukrainian army, Russian airborne troops landed in the eastern Ukrainian city of Kharkiv, while adding that there were immediate clashes. Meanwhile, Biden accused his Russian counterpart Vladimir Putin of waging a "premeditated and unprovoked" war against Ukraine, as the President made his maiden State of the Union Address.Russian Foreign Minister Sergei Lavrov said on Wednesday that if a third World War were to take place, it would involve nuclear weapons and be destructive, the RIA news agency reported. Lavrov has said that Russia, which launched what it calls a special military operation against Ukraine last week, would face a "real danger" if Kyiv acquired nuclear weapons.