Nearly 400 Indian students in Ukraine's Sumy city bordering Russia have taken shelter in a basement after Russian forces took control of it and have appealed to the government of India to evacuate them.

Ukrainian President Volodymyr Zelenskyy said 137 civilians and military personnel have been killed so far in the Russian invasion of his country.

 President Joe Biden said the US will intervene if Vladimir Putin moves into NATO countries, stressing that if his Russian counterpart is not stopped now, he will be emboldened.

New Delhi: Ukraine is "deeply dissatisfied" with India's position on the crisis arising out of Russian military offensive, Ambassador Igor Polikha said on Thursday and sought New Delhi's support in defusing the situation.

An adviser to Ukraine's president says about 40 people have been killed so far in the Russian attack on the country. Oleksii Arestovich, an adviser to President Volodymyr Zelenskyy said Thursday that several dozen people have been wounded.

 Stocks plunged and oil prices surged by more than 5 per barrel Thursday after President Vladimir Putin launched military action in Ukraine, prompting Washington and Europe to vow sanctions on Moscow that may roil the global economy.

The Russian military says it has knocked out Ukraine's air defence assets and airbases.

Russian troops launched their anticipated attack on Ukraine on Thursday, as President Vladimir Putin cast aside international condemnation and sanctions, warning other countries that any attempt to interfere would lead to consequences you have never seen .