It is the last time the men would be seen alive: In two videos, Russian paratroopers march them at gunpoint along a street in Bucha, a suburb of Kyiv. Some of the Ukrainian captives are hunched over, holding the belts of those in front of them. Others have their hands over their heads. "Walk to the right, bitch,” one of the soldiers orders them.

The videos, filmed March 4 by a security camera and a witness in a nearby house and obtained by The New York Times, are the clearest evidence yet that the men were in the custody of Russian troops minutes before being executed.

"Hostages are lying there, against the fence,” the person filming one of the videos says. He counts: "One, two, three, for sure, four, five, six ... ” In total, nine people are being held.