Within hours of the attack on a shopping centre in the central Ukrainian city of Kremenchuk, false and unproven claims began circulating online.
Stories were spread by Russian Telegram channels and by Dmitry Polyanskiy, Russia's deputy ambassador to the United Nations. They included rumours that the attack was "false" or "staged" - and were repeated on Russian television.
On Tuesday, Russia's defence ministry released a statement claiming the shopping centre was "non-functioning" and that the bombing of a nearby ammunitions dump sparked a secondary fire at the centre. Those claims were denied by Ukrainian officials.
What's the truth?
This claim is false. BBC reporters on the ground have spoken to shoppers and employees who were inside the building at the time of the attack.
Multiple posts listing details of missing people who were either working at the shopping centre on the day or went shopping there, were published in a local Telegram channel in the hours after the attack.
One pro-Kremlin "fact-checking" channel suggested that no photographs from inside the shopping centre had been posted on Instagram since March. However, a woman who lives in a nearby village and regularly goes shopping in Kremenchuk, told the BBC that the shopping centre had been "constantly open" and her family had visited it at least once a week.
She also shared video she had taken at the shopping centre from 25 June, showing open shops and people...
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