Death of Andriy Parubiy in Lviv seen as part of a covert campaign of hits and car bombs waged by Moscow and Kyiv

Dressed all in black and wearing a yellow helmet, the man on the bike looked like just another food delivery driver, one of hundreds crisscrossing the city of Lviv with a big yellow box on his back.

This courier had no meals to deliver, however. Instead, he lurked on a quiet side street, waiting for a balding 54-year-old with cropped grey hair at the sides and black-rimmed spectacles to appear.