There are sources given for the claims. If they are inaccurate you should remove the sources, and the claim itself if there are no good sources supporting it anymore.
If you bother reading the sources, then you'll see that these aren't primary sources of anything the Russian government said. These are articles and interpretations by western analysts and think tanks. Feel free to link statements from the Russian government though.
I already have sources. If you don't believe them, it's up to you to show that, not me to provode you with endless sources that you anyway will reject for some reason.