"In April, the International Civil Aviation Organization warned governments that there was a risk to commercial passenger flights over Ukraine"

Care to name the other parts of the world such warnings are posted for? These tend to be "Cover-your-ass" announcements.

"On 14 June, an Air Force Ilyushin Il-76 aircraft was shot down on approach to Luhansk International Airport; all 49 people on board died.[48] After that incident, on 29 June, Russian news agencies reported that insurgents had gained access to a Buk missile system after having taken control of a Ukrainian air defence base (possibly the former location of the 156th Anti-Aircraft Rocket Regiment [156 zrp] of the Ukrainian Air Force).[49][50][51] On the same day, the Donetsk People's Republic claimed possession of such a system in a since-deleted tweet. .........wiki"

"On approach to" indicates low altitude so MANPADS system probably used

"Russian news agencies reported" - and we all know these to be totally reliable, free from any government influence and totally unbiased - and the band played believe it if you can.

Immediately the "Separatist" claim came in relating to the capture of such systems from the the Ukrainian armed forces the Ministry of Defence in Kiev issued a statement that all their systems were accounted for. A date for when the Tweet about the "captured" BUK systems was deleted would indicate that it was deleted so that the Russians and the "Separatists" could claim that they did not have any system capable of shooting down the airliner. Bit pointless really as the BUK Launcher was spotted on no less than three occasions in the vicinity of where the missile was launched, the launch plume that brought down the airliner was spotted and the jubilant reports of the "confirmed kill" were recorded and those speaking were identified as being a rebel separatist commander located in the area from which the missile had been fired and a serving Military Intelligence Officer in the Russian Army.