ITV News can reveal the true and terrible story of what happened to a major hospital in Mariupol in the days and weeks after Russia's invasion.
Many wounded Ukrainians were treated at Hospital Number One, but it was bombed - deliberately - by Russian forces, killing dozens of people.
The city's mayor and doctors who worked there believe it was a revenge attack, after some people refused to be deported to inside Russia.
Our Global Security Editor Rohit Kachroo has pieced together what happened - and how a hospital became a target of war:
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