British intelligence believes that the Buk anti-aircraft missile system used in the summer of 2014 to shoot down Malaysia Airlines Flight 17 over Ukraine was brought into the country and subsequently recovered by the Russian military. This was stated in the report of the Intelligence and Security Committee of the British Parliament with reference to the Secret Intelligence Service or MI6.
In particular, the report quotes from MI6 documents of 2016 stating that "without any doubt,” the Buk was brought to Ukraine and then taken out by the Russian military.
“SIS informed Parliament that "all three Russian intelligence services are tasked with carrying out ‘information operations’ [that] go beyond promulgating the Russian perspective and includes the creation and propagation of forgeries and falsehoods." One obvious area is Ukraine where Russia conducts information warfare on a massive scale.
An early example of this was a hugely intensive, multi-channel propaganda effort to persuade the world that Russia bore no responsibility for the shooting down of [Malaysian Airlines flight] MH-17, which was an outright falsehood. We know beyond any reasonable doubt that the Russian military supplied and subsequently recovered the missile launcher,” the report reads.
In 2016, the International Investigation Group, which studies the circumstances of the Boeing crash over Ukraine, said it has irrefutable evidence that the airliner was shot down by the 9M38 anti-aircraft missile of the Buk missile system.
In addition, the investigation has evidence that asserts that the launch site of the missile was a field near the separatist-held town of Pervomaiske, which at that time was under the control of pro-Russian separatists.
According to the findings of the Bellingcat researchers, on June 23-25, 2014, the 53rd Russian anti-aircraft missile brigade transported some equipment across Russia to positions near the Ukrainian border. Among this equipment there was also a Buk missile system numbered 332 and subsequently seen in Ukraine on July 17 and 18, 2014.
On the morning of July 17, 2014, "Buk 332" left Donetsk in a trailer, heading east through the territory controlled by the separatists. In the first half of the day it reached the town of Snizhne. After arriving in Snizhne, Buk 332 was unloaded from the trailer and continued to move on its own, leaving the city and heading south.
Buk 332 arrived in the field to the south of the Snizhne near the town of Pervomaiske, from where it fired a rocket that caused the crash of the MH17 flight.
The Buk was filmed on the morning of July 18, 2014, when it was traveling through the separatist-controlled city of Luhansk in an eastern direction towards the Russian border.
Transportation of the Buk was controlled by Major General of the Main Intelligence Directorate of the Russian Federation Sergey Dubinsky, aka Hmuriy (Gloomy).