KEY POINTS
  • Russia's invasion of Ukraine represents one of the worst security crises in Europe in decades.
  • It is also expected to have far-reaching implications for the global economy, particularly given Russia's role as the world's second-largest producer of natural gas and one of the world's largest oil-producing nations.
  • "Sanctions on Russian oil and gas would mean higher energy prices the world over," Troy Vincent, senior market analyst at researcher DTN Markets, told CNBC via email.
Russian state-owned energy giant Gazprom announced that it would halt gas supplies to Poland and Bulgaria after they refused to pay for gas in Russian rubles following the Kremlin's demands.

Russian forces on Thursday launched their long-feared attack on Ukraine, sending shockwaves through financial markets and ratcheting up fears about the ramifications for gas supplies around the world.

Russian President Vladimir Putin cast aside international condemnation and the first tranche of sanctions by declaring the beginning of a "special military operation" aimed at the "demilitarization" of Ukraine.