Russian military losses in Ukraine have increased sharply in recent months, driven largely by Ukraine's expanding use of combat drones, according to a new analysis by the Washington-based Center for Strategic and International Studies (CSIS). The study estimates that Russia has suffered around 1.

Ukraine's General Staff has updated data on Russian losses: Russia lost 1,350 soldiers killed and wounded over the past day.

GCHQ estimates that half a million Russian troops have been killed - and increasingly this due to drone warfare on the frontline