Who is responsible for deportation of Ukrainian children to Russia?

Context: On 17 March 2023, the International Criminal Court issued arrest warrants for Vladimir Putin, the President of Russia, and Maria Lvova-Belova, Russian Commissioner for Children's Rights, alleging responsibility for the unlawful deportation and transfer of children during the Russian invasion of Ukraine. The warrant against Putin is the first against the leader of a permanent member of the United Nations Security Council.

The 123 member states of the ICC are obliged to detain and transfer Putin and Lvova-Belova if either sets foot on their territory.

Answer: President of Russian Federation Vladimir Putin and Maria Lvova-Belova, Russian Commissioner for Children's Rights are directly responsible the unlawful deportation of Ukrainian children to Russia. This crime against humanity along with many other atrocities (like Bucha massacre) has been committed by Russians during the Russian invasion of Ukraine that started on February 24, 2022.