By some estimates, Russia has taken 1.5 million casualties in its war against Ukraine, including a half million killed since the war began. Now, as Russia runs out of recruits, it is bringing in mercenaries from far away. Special correspondent Simon Ostrovsky reports. A warning: Some images in this story are disturbing.

The report estimates Russia has sustained far heavier losses, with up to 450,000 troops killed and casualty rates increasingly outpacing those of Ukraine.

The number includes 1,140 casualties that Russian forces suffered over the past day.