Russian army has lost up to half of key battle tanks, analysts estimate

Ukrainian defenders could have destroyed up to 40% of Russia's pre-war army tank fleet but thousands of older models still in store

Russia's army is estimated to have lost nearly 40% of its prewar fleet of tanks after nine months of fighting in Ukraine, according to a count by the specialist thinktank the International Institute of Strategic Studies (IISS).

That rises to as much as 50% for some of the key tanks used in combat, forcing Russia to reach into its still sizeable cold war-era stocks. Ukraine's tank numbers are estimated to have increased because of the number it has captured and supplies of Soviet-era tanks from its western allies.