KYIV, Ukraine (AP) — Ukrainian drones struck a major refinery deep inside Russia, military officials said Thursday, the fourth in three days in Kyiv's ongoing campaign to choke Moscow's vital oil sector.
Russia is one of the world's biggest energy producers, with oil providing an economic mainstay as its military tries to push deeper into Ukraine in a slow and costly advance more than four years after Moscow launched its full-scale invasion.
READ MORE: Ukrainian drone attack on oil hub deep inside Russia kills 13, official says
The attacks have dented Russia's refining capacity, causing shortages at gas stations. Kyiv officials say the onslaught is meant to compel Russian President Vladimir Putin to seek a peace deal, but there's no sign that strategy is working.
The targeted refinery is one of Russia's biggest
