The letter, written by Bathsheba Crocker, the U.S. ambassador to the United Nations and other international organizations in Geneva, said, “I would like to bring to your attention disturbing information recently obtained by the United States that indicates that human rights violations and abuses in the aftermath of a further invasion are being planned.”

“These acts, which in past Russian operations have included targeted killings, kidnappings/forced disappearances, unjust detentions, and the use of torture, would likely target those who oppose Russian actions,” said the letter addressed to Michelle Bachelet, the U.N. high commissioner for human rights.

Crocker says the Russian military’s targets would include Russian and Belarusian dissidents in exile in Ukraine, journalists and anti-corruption activists, and “vulnerable populations such as religious and ethnic minorities and LGBTQI+ persons.”

“Specifically, we have credible information that indicates Russian forces are creating lists of identified Ukrainians to be killed or sent to camps following a military occupation,” the letter said, adding that the Biden administration also had information indicating Russian forces would likely use “lethal measures” to subdue peaceful protests or other “peaceful exercises of perceived resistance from civilian populations.”