Russia-Ukraine war, May 21 -- A chilling radio command-"Take the commander captive and kill everyone else"-has become the latest piece of evidence in a growing dossier suggesting that Russian military commanders are systematically ordering the execution of surrendering Ukrainian soldiers, in stark violation of international humanitarian law.

The order, intercepted by Ukrainian intelligence and supplied to international media, is part of a series of radio transmissions between Russian forces during a brutal engagement in Ukraine's eastern Zaporizhzhia region last November.

The radio traffic, reviewed alongside drone footage that appears to capture the execution of Ukrainian prisoners, offers a rare, synchronised glimpse into the alleged ...