Traffickers are targeting parentless children on the Ukraine-Poland border, says a group evacuating orphanages in the war zone.
A team of US military veterans is helping to organise safe passage for the estimated 200,000 children in Ukraine's orphanages and foster homes.
But they say thousands are unaccounted for and fear some may already have fallen prey to people traffickers.
Kyiv says it is tightening procedures for vulnerable children.