Ukrainian President Volodymyr Zelensky has released footage of nighttime attacks on Russian military and industrial targets - among them a Moscow oil refinery, struck, by his account, for the second time in a week.

"Our long-range sanctions have once again reached the Moscow region - for the second time this week, the Moscow refinery was struck," Zelensky said. According to the release, targets in the Rostov region and on temporarily occupied Ukrainian territories were also hit. Zelensky spoke of "long-range sanctions" and "medium-range air strikes" - phrasing that suggests this time it isn't only about drones.

Here an interesting gap emerges between the two sides. Moscow Mayor Sergei Sobyanin announced that air defense shot down 52 drones over the capital - but made no mention of missiles. The Ukrainian side, meanwhile, insists it used precisely medium-range missiles. Who is telling the truth is hard to verify; but one side's very silence about the missiles says something.

The war has long since stopped being fought only on the front line. When refineries burn deep inside the Russian region, and drones and missiles reach the doorstep of major cities, it becomes clear that the idea of a "safe rear" has vanished for both sides. And every refinery hit also means something broader - disrupted supply, price spikes, consequences spilling far from the battlefield. The question hanging over all of it is how long this exchange of blows can go on before someone says enough.