Sounds like a reputable source. Alot of propaganda coming out of Ukraine now. Trust But Verify someone once said.
We heard this from a variety of sources over there, enough that I was confident in the veracity of the information, Moulton said, also being careful not to disclose classified U.S. intelligence.
Both Thornberry and Moulton agreed with Vershbow's assessment that Russian President Vladimir Putin was struggling to keep up the ruse that he has no soldiers fighting inside Ukraine. Moulton said the mounting evidence of dead Russian soldiers is causing a domestic backlash for Putin. Russian and Ukrainian bloggers and activists have been compiling lists of Russian soldiers killed in Ukraine, including details of their service and circumstances of their deaths. New organizations in Russia representing soldiers families have sprung up to publicly challenge Putin's narrative."
http://www.bloombergview.com/articles/2015-05-26/putin-burns-his-dead-to-hide-ukraine-aggression