RAK, name, surname, eyes downcast, white woe bower clavor pulled up ice Ukrainian

captor to reveal pink boyish cheeks. A terrified Russian soldier is being interrogated.

A year of birth, military honor, duty, mother to eat. Age, unit, job, mum and dad still alive. Hundreds of videos like this

have prisoners taken by Ukrainian forces as they battle the Russian invasion and being posted on social media

and being seen by the captives horrified families back in Russia despite the criminal

incidents to prevent them finding out the reality of the war. Tatiana, not her real name, is the

sister-in-law of that young, frightened prisoner that's called him Pavl. She had no idea he was part of a force

invading a neighbouring country. I'm Tim Hewall and for this edition of assignment here on the BBC World Service,

I'm going to try to find out what happened to him and what Russians subject to an information

blockade by their own government, know and think about the war the Kremlin is waging in Ukraine.

To her shock and outrage, Tatiana's only help in searching for Pavl has come from the enemy he went to fight.

Our only support is from the people of Ukraine because our fellow Russians don't want to help us.

The video of Pavl we're not playing his answers to protect his identity is from a Ukrainian social media channel

called Find Your Loved Ones. It posts details of Russian servicemen killed or captured including in many cases

there are dresses, even their relatives phone numbers. That's how I got in touch with Tatiana.

In the first of several conversations on an encrypted messaging service, she told me she was at the clinic where she works in her small city

when her husband Pavl's brother forwarded the video to her.

I didn't watch it at first because we're not allowed to use our mobile as a twerg but then I got a message from his sister too

and I realized what the video must be. Then I just ran like a bullet from a gun. I dropped everything people around me were talking but I didn't hear anything they said.

I was just in shock.

Pavl's 21, a few years younger than Tatiana, he was a professional soldier but no one knew a war was coming so they weren't alarmed by what he told them on February the 20th.

He said he was going to a field camp for three days for training exercises. He promised to cool when he got there.

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