One of the articles cites Belarus first reporting this but that said, you don’t know if it could be some sort of intelligence trick at that.
http://www.businessinsider.com/russia-using-mobile-crematoriums-in-ukraine-2015-5 (please see Belarus mentioned under photograph)
So on one hand, wait for further confirmation, it is such a strange story, sometimes truth is stranger than fiction as they say.
Maybe there is another explanation, I admit, it is very macabre.
My take is Russia is being ruled by committee anyway and that Putin is largely a perfunctory figurehead, I really don’t think he is calling all of the shots.