Smiling alongside mercenaries in full combat gear, this is how Russian war propagandist Sergei Sreda marked a visit to Wagner's Ukraine headquarters last week - saying they welcomed him 'like family' and told 'funny stories'.

But Sreda may have condemned the men to death - giving away the base's location in the occupied city of Popasna after inadvertently photographing a street sign that contained the address of a nearby bomb shelter.