'Russian lieutenant colonel' meets Ukrainian police officers
14 April 2014 Last updated at 17:20 BST
A video has been posted on YouTube of a man who purports to be a Russian army lieutenant colonel with a line of policemen in east Ukraine.
The man - who wears a cap but no insignia - introduces a man in a black coat as the new head of the Horlivka police.
The video has not been fully verified but is believed to be genuine, as Jon Sopel reports.