Investigators in Paris are beginning to try and establish how a fire destroyed parts of the Notre-Dame cathedral.
The building's spire and much of its roof collapsed, but the main stone structure survived.
French President Emmanuel Macron says the medieval cathedral will be rebuilt.
An international appeal's been launched to raise funds for its restoration.
Our correspondent in Paris Elena Casas says ongoing works at the site are one line of investigation.
IN: "The building...
OUT: ...done soon."
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