The Orenburg Gas Processing Plant and two satellite communications centers were struck overnight, setting the facility on fire and triggering outages in Sevastopol.Ukrainian forces also struck a helium plant and other energy sites in the Orenburg region, and debris in Nizhny Novgorod killed two people while an earlier assault has left Moscow's largest refinery out of service.Russia says it shot down hundreds of drones but acknowledges damage at key facilities, and officials are weighing diesel export bans and emergency measures as they assess broader impacts on transport and civilian services.