CBS News on Twitter: "DEVELOPING: Paris police says police operation ongoing at Notre Dame Cathedral, urge people to avoid the area https://t.co/MiENa7bBsa https://t.co/lW9wZehkru" / Twitter
Notre Dame Cathedral fire cause: "Computer glitch" may be behind Notre Dame Cathedral fire, rector says today - live updates
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Webcam Catches Unknown Person On Notre Dame Roof and a Flash Before the Fire - Wow Video
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