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.

Russia may use its new Oreshnik hypersonic missile to attack "decision-making centres" in Kyiv in response to Ukraine's firing of Western missiles at Russian territory, President Vladimir Putin said on Thursday.