Yes. Many news sources reported on it.<p>As for the actual content in question - here&#x27;s an archive of a tweet of them boasting about having Buk missile launcher, the tweet was later deleted:<p><a href="http:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20140707150151&#x2F;https:&#x2F;&#x2F;twitter.com&#x2F;dnrpress&#x2F;status&#x2F;483248037629018112" rel="nofollow">http:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20140707150151&#x2F;https:&#x2F;&#x2F;twitter.co...</a><p>Here&#x27;s a screenshot of the VK account where their (now former) commander and defense minister (and allegedly &quot;ex&quot; FSB member) claimed the downing of a Ukrainian plane, later the content was deleted:<p><a href="http:&#x2F;&#x2F;i.imgur.com&#x2F;fi4Zkx6.png" rel="nofollow">http:&#x2F;&#x2F;i.imgur.com&#x2F;fi4Zkx6.png</a><p>The Wikipedia article covers all that in depth:<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Malaysia_Airlines_Flight_17" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Malaysia_Airlines_Flight_17</a>