The aftermath of a bomb hitting a Ukrainian theatre, where hundreds of people were hiding, was "terrible" and "heartbreaking", says 27-year-old locksmith Vladyslav.
The BBC has spoken to survivors who described for the first time what happened when the bomb fell on the building in the besieged south-eastern city Mariupol.
Vladyslav, who does not want us to use his full name, was near the main entrance when the explosion hit.
He ran with others into a basement and, 10 minutes later, heard the building was on fire and emerged to a scene of chaos.
"One mother was trying to find her kids under the rubble," he says.
"Terrible things were happening."
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