President Vladimir Putin on Thursday threatened to strike "decision-making centres" in Kyiv with Russia's new hypersonic missile, hours after Moscow pummelled Ukraine's energy grid in an attack that left a million people without power.

President Vladimir Putin has threatened to target Kyiv's "decision-making centres" with a new ballistic missile. Questions have been raised about its potential impact and speed after it was used to attack the Ukrainian city of Dnipro last week.

Russian President Vladimir Putin Thursday threatened to strike "decision-making centers in the Ukrainian capital, Kyiv, with Russia’s new Oreshnik hypersonic cruise missiles, after pounding Ukrainian energy infrastructure and cutting off power to more than one million people across the country.