U.N.: Russia violating child protection principles

STORY: Speaking at the UNHCR offices in Kyiv following a six-day tour of the country, Filippo Grandi said Ukraine's president had asked his agency to "do more" to help children from occupied regions to whom this was happening.

"Giving them (Russian) nationality or having them adopted goes against the fundamental principles of child protection in situations of war," Grandi said.

"This is something that is happening in Russia and must not happen," he added.

Grandi said his agency was unable to estimate the number of children who had been given passports or put up for adoption, as access in Russia was extremely limited.

Russia has said accusations Ukrainian children have been abducted are false.