Watch The Moment Russian Soldiers Kill Ukrainian Civilians (Video)

When Russian forces shot Leonid Pliats and his employer in the back, the killing was filmed on CCTV cameras in graphic detail. Ukrainian prosecutors are investigating the clip, which was obtained by the BBC, as a possible war crime.

It was the height of the war in Kyiv, and the main highways entering the capital, including the bicycle shop where Leonid worked as a security guard, were a battleground.

But this wasn't a firefight: the video clearly shows Russian soldiers murdering two defenseless Ukrainians and then robbing the shop.

We have pieced together the full sequence of events, matching what was recorded on multiple CCTV cameras around the site with the testimony of people Leonid phoned that day, as well as the Ukrainian volunteer fighters who tried to rescue him.

The Russians arrive in a stolen van daubed with the V sign used by Russian forces and the words Tank Spetsnaz in black paint. They wear Russian military uniform and approach with their guns up, fingers on the triggers.

Leonid walks towards the soldiers with his hands up to show he's unarmed and no threat.

The Russians initially talk to him and his boss through the fence. There is no audio on the footage but the men seem calm, they even smoke. Then the Ukrainians turn away and the soldiers start to leave.

Suddenly they turn back, crouch then shoot the two men multiple times in their backs.

One is killed outright but somehow Leonid manages to stagger to his feet. He even ties his belt around his thigh to slow the blood, then stumbles to his cabin where he begins to call for help.

Vasyl Podlevskyi spoke to his friend twice that day, as he sat bleeding heavily.

Leonid told him the soldiers claimed they don't kill civilians, then they shot him.

"I said can you at least bandage yourself up? And he told me, Vasya, I barely crawled here. Everything hurts so much. I feel really bad," Vasyl remembers the call.

"So I told him to hang in there and started phoning the territorial defence."

The men he called used to sell air conditioning before the war.