Russian presidential aircraft and funds were used in a program that took children from occupied Ukrainian territories, stripped them of Ukrainian identity and placed them with Russian families, according to a report by Yale's School of Public Health.

The U.S. State Department-backed research, published on Tuesday, identified 314 Ukrainian children taken to Russia in the early months of the war in Ukraine as part of what it says was a systematic, Kremlin-funded program to "Russify" them.

Reuters was unable to confirm the report's findings independently.