At the end of September, in separatist-controlled eastern Ukraine, the Organization for Security and Co-operation in Europe located a Russian-made rocket launch system that had never been exported to the Ukrainian military. The system, a 220mm TOS-1 Buratino thermobaric multiple rocket launch system, is one of the most blatant pieces of evidence to surface so far showing Russia’s involvement in the almost two-year-long war. And now the UK wants Russia to answer for its presence in the war-torn east.

“The Buratino is produced in Russia and has never been exported to Ukraine,” the UK’s Delegation to the OSCE said in a tweeted statement Wednesday. “We are requesting the delegation of the Russian Federation to explain the presence of the TOS-1 Buratino in this training area.” Russia has repeatedly denied claims of sending troops or equipment into Ukraine. The OSCE, which provides almost daily updates on the situation in the country, identified the Buratino on Sep. 25 parked in a training area near the Ukrainian city of Luhansk. A few days later it was gone. CONTINUE