Want to know whose seen them? Ukrainians, NATO, the USA, and reporters from the AP, and reporters from the British media. They saw them cross the bloody border, multiple occasions. They've seen them shoot from the border onto Ukrainian territory. They have satellite photographs, videos taken from cell phone cameras, photographs taken by stupid Russkie soldiers boasting about shooting at Ukraine or being in Ukraine.
But, of course, they're all lying and only Soviet Russia speaks true, or so says the Putinist crowd:
The USA is a hostile country to Russia. The NATO is a hostile military alliance, led by a hostile country. The English-speaking countries and the EU are the US puppets. Why do any of them deserve a bit of trust?
None have been released to public.
videos taken from cell phone cameras, photographs taken by stupid Russkie soldiers boasting about shooting at Ukraine or being in Ukraine.
Falsifiable, several voice records have been denounced as baked by the Ukrainian SBU, and I have never seen an answer for this.