Olena and Oleksandr in the relative safety of Lviv, after escaping Mariupol
"You can't imagine how horrible the conditions were."
Oleksandr and Olena are two of the lucky few who recently managed to escape from Mariupol, which is now almost under full Russian control after weeks of bombardment.
The city is effectively sealed off from the world, and information about what is happening inside is difficult to confirm independently.
But the pair, and others, have given chilling accounts of life in Russia's so-called filtration camps, set up outside Mariupol to house civilians before they are evacuated.
