Here's the story I picked up about Russians surrendering. Numbers not given in the newspaper, but I read 300 conscript soldiers mutinied. They were treated as cannon fodder by Putin.
Finding themselves in a horrid situation, without sufficient weapons and ammo to fight and yet put in the firing line, they killed the commander who threatened them with execution if they retreated.
They rang up the Ukrainian hotline and surrendered. Good for them. Right decision. You don't need to die for a sociopath.
http://www.express.co.uk/news/world/1683089/russia-news-troops-mutiny-kill-commander-putin-ukraine-war-lates