Following a nighttime drone attack in Ryazan that damaged one of Russia's largest oil refineries and caused an "oil rain" in the city, authorities declared a state of emergency on May 15. — Ukrinform.

Ukraine's military reportedly launched a large-scale drone attack overnight on May 15, striking Russian military and energy infrastructure in multiple regions of Russia, Russian…

Overnight drone attacks hit the Ryazan oil refinery in Russia, causing explosions, a large fire and injuries. Airports in several Russian cities also faced disruptions.