Fighters of the Unmanned Systems Forces (USF) of the Armed Forces of Ukraine (AFU) struck two Russian chemical plants for the production of explosives at night – Akron (Veliky Novgorod, Russia) and Dorogobuzh (Smolensk region, Russia), as well as a number of critical, strategic and military infrastructure facilities, including a refinery, USF commander Robert (Madyar) Brovdi said.