The United States has seen indications that some Ukrainians are being moved to Russia against their will, the Reuters news agency quoted Pentagon spokesperson John Kirby as saying on May 9.
Kirby called these actions "unconscionable."
When asked about the camps, the spokesperson said he could not say what they looked like.
Since the beginning of the full-scale military invasion, the invaders have forcibly abducted 181,000 Ukrainian children to Russia. About 2,000 of them are orphans who have been given up for adoption by Russian families.
The forced abduction of children is a direct violation of the UN Convention on the Rights of the Child and is prohibited by the 1949 Geneva Convention (IV), in particular Articles 4, 49, and 147.
Russia's acts concerning the forcible relocation or deportation of children under the protection of the Protecting Power under Geneva Convention IV may be classified as a war crime under Article 8 (2) (a) (vii) of the Rome Statute of the International Criminal Court.