Russian Foreign Minister Sergey Lavrov said that Russia possesses weapons "that will have serious implications for the handlers of the Ukrainian regime."

Putin argued that the attack didn't divert Russia from a more important mission — gaining ground in eastern Ukraine.

Ukraine's President Volodymyr Zelenskiy attends a joint press conference with European Commission President Ursula Von der Leyen (not pictured), amid the Russia-Ukraine conflict, in Kyiv, Ukraine September 20,

Vyacheslav Volodin, chairman of the Russian Duma, has chillingly warned that Moscow can target the 'EU Capital' with nuclear weapons

In a shocking escalation, Russian forces launched a devastating missile attack targeting Ukraine’s secret intelligence communications centre. Massive explosions rocked Kyiv and surrounding regions, including Kharkiv and Sumy,

Ukraine's foreign minister said on Saturday that Russia is planning strikes on Ukrainian nuclear facilities before the winter, and urged the U.N.'s nuclear watchdog and Ukraine's allies to establish permanent monitoring missions at the country's nuclear plants.

The explosion would be at an old Soviet test site first used 70 years ago in the Novaya Zemlya archipelago and could be used by Vladimir Putin as a warning to the West over Ukraine