Russia's defense minister has accused Ukraine of preparing to use radioactive "dirty bombs" in the war.
The US, UK, France, and Ukraine rejected the claim amid concerns that the war is escalating.
Shoigu made the accusations in phone calls with his counterparts from the US, UK, France, and Turkey on Sunday, per AP.
The US, the UK, and France dismissed Russia's claim about "dirty bombs" in a joint statement on Monday.
Ukrainian President Volodymyr Zelenskyy also hit back at the allegation about "dirty bombs" in a video address on Sunday.