Also that the missile was transported from Russia shortly before the shootdown, and the launcher and remaining missiles were transported back to Russia. They mean "came from" in a more specific manner than just that it was made there.
That was from social media images that are not news. It was reported on at the time. I'm not sure what's new here other than a two years too late rubber stamp of eyewitness reports.
What's new is that the statement is now based on a great deal of hard evidence and investigation, rather than a couple of pictures and some internet commentators.