Ukraine's military intelligence confirmed that a Russian Su-57 stealth fighter jet burned at Akhtobinsk airport on Thursday, attributing it to an engine failure to start due to suspected low jet fuel quality. Russia lowered jet fuel standards in August as Ukrainian attacks reduced refinery output, though it was unclear whether the decision was directly related to Thursday's incident.

Ukraine's military intelligence confirmed that a Russian Su-57 stealth fighter jet burned at Akhtobinsk airport on Thursday, attributing it to an engine failure to start due to suspected low jet fuel quality. Russia lowered jet fuel standards in August as Ukrainian attacks reduced refinery output, though it was unclear whether the decision was directly related to Thursday's incident.