WASHINGTON, March 21- President Joe Biden confirmed Russia's use of hypersonic missiles in Ukraine, warning Russian President Vladimir Putin's "back is against the wall," which means he could resort to using more severe tactics as the war stretches into another week, USA Today reported.

KYIV, March 21 - Ukraine rejected demands from Moscow on Monday to surrender the strategically important port city of Mariupol, as Russian forces continued relentless attacks aimed at forcing the city into submission, NBC News reported.

KYIV, March 20 - A Ukrainian court has seized the assets and all the shares of aerospace company Motor Sich, one of the world’s largest producers of engines for helicopters and planes, RFE/RL reported Saturday.

KYIV, March 18 – The conference on reforms in Ukraine will take place in Vilnius on July 6, 2021, Lithuanian President Gitanas Nauseda said during an official visit to Ukraine.

KYIV, March 19 – Ukraine has joined the NATO Energy Security Center of Excellence, the Energy Ministry's press service reported Thursday.

The agreement was signed by acting energy minister Yuriy Vitrenko during the visit of President of the Republic of Lithuania Gitanas Nauseda.

KYIV, March 19 - Ukraine has imposed sanctions on former President Viktor Yanukovych and former Prime Minister Mykola Azarov, freezing their assets and property, banning them from withdrawing capital from the country and stripping them of all state awards, Reuters reported.

KYIV, March 20 – President Petro Poroshenko by his decree No. 82/2019 enacted the decision of the National Security and Defense Council of Ukraine (NSDC) dated March 19, 2019 on the application, abolition and amendment of personal special economic and other restrictive measures (sanctions), in particular against the heads of the Federation Council of the Federal Assembly of the Russian Federation and the deputies of the State Duma of the Russian Federation.

KYIV, March 20 – Comedian Volodymyr Zelensky and incumbent President Petro Poroshenko are most likely to compete in the second round of Ukraine's presidential elections, according to results of a survey conducted by the Socis Center for Social and Marketing Research.

KYIV, March 20 – The West should increase pressure on the Russian leadership in response to the poisoning of former Russian intelligence agent Sergei Skripal and his daughter in Salisbury (Great Britain), Foreign Minister Pavlo Klimkin said.

KYIV, March 21 – The Ukrainian government has terminated the program of economic cooperation with Russia for 2011-2020, Prime Minister of Ukraine Volodymyr Groysman said Wednesday.