Evidence of DNR separatists being in posession of 9K37 Buk SAM since June, 29th

On the 29th of June, DNR has captured the 9K37 Buk SAM from a Ukrainian air defense base.
A missile system capable of reaching high altitudes (one that was likely used to shoot down the Malay Boeing 777 today)
Reports of the captured SAM by the "separatists" themselves:

rusvesna.su/news/1404041521 (separatist news site) provides the photos:

Picture of the tweet:

Link to google cached version of the tweet, since it was deleted!
Mobile anti-air missile rocket system "Buk" on the territory of the anti-air defense air base PVO A1402 which was taken under control by DNR
A Putin propaganda bot even reported it on Liveleak:www.liveleak.com/view?i=e57_1404051041

Russian media reports:

The sky above Donetsk will now be defended by the anti-air asset "Buk".

Donetsk people's army took control an air defense base A-1402. The base is armed with anti air defense systems "Buk"...etc.

Report by ITAR-TASS, the official Russian news agency (akin to Reuters, for instance):

Headline: People's army of DNR has captured an air defense base along with SAM complex "Buk"