Ukrainian drones attacked the Russian Lukoil refinery in Kстово last night, causing multiple fires. It is likely that Zelensky has given up hope of US aid, which is why he is attacking Russian oil assets under these circumstances. The US initially asked Ukraine not to attack Russian oil assets and then bought fuel and diesel from Russia. Of course, it was only looking for media leverage in this matter, because the fuel sent by Russia, after about two weeks, will only cover ten days of US consumption. On his last trip, Zelensky turned to Turkey; it remains to be seen what Trump's position on this issue will be.