A better translation of that Facebook post I put up earlier -
Roman Bochkala, journalist for TV Inter in Ukraine, had this comment on his Facebook (translated by The Interpreter):
I urge you to pay attention!!! There is information in the news about the movement of the BUK. Supposedly the passenger plane could have been shot down today from this system. Here's the news from Donetsk Region. Information from local residents. Today the separatists seized the STO auto center at No. 108 Shchorsa St., and it looks like a department of the water canal.
Near the children's store they have set up firing positions. Today at 11:25, a column went through the town of Zurges heading toward Shakhtyorsk with: 1) a Chevrolet Niva 2) 3 tanks 3) a Renault Traffic 4) a Volkswagen Transporter 5) a ZIL with people with the top down. Armed terrorists numbering about 100-150 were observed in Lutugino.
They are deployed in two groups. The first is in the very center in the dormitory of a children's clinic. The second is "beyond the [civilian] quarters" near a red-brick bank under construction. At 12:10 pm, a missile system (looking like a BUK) passed through on a trailer plus two cars for cover through Torez toward Snezhnoye. In Marinke, the terrorists are situated in the post office and Ukrtelekom (47.939448, 37.501337) and Emergencies Ministry (47.938623, 37.499827). They drove the missile system on the trailer plus the two cars through Torez, in the direction of Snezhnoye, at 12:10. It looked like a BUK. The top was draped over. At 13:10 three tanks and a minibus passed through Torez to Snezhnoye.
All of this is unconfirmed, though the source has proven reliable. The claim also matches a scenario that could have brought this aircraft down with a Buk. AP reported earlier that one of their journalists also spotted a Buk in eastern Ukraine, though we have no additional details on this claim.