Russia is providing assistance right across the board. A lot of the pro-Russian side is actually Russian special forces. The media call them the green men. They are all over the place. They have a huge special forces capability in Russia, and that is now filtering over the border at various times to assist, train, and actually operate on behalf of the separatists within the Ukraine. This is something that's very difficult for the Ukrainian governments, and in particular the Ukrainian military, to be able to deal with because of the simple fact that they don't know who these people are because they all speak the same language. If you take a uniform off of a special forces soldier, he can be anybody.
On October 25th, 2017. See this statement in context.