I'm in agreement. Construction induced fire somehow.
I'm watching on CNN and it's worse and you can't see any firemen trying to fight it, at least from the tv views. The entire Spire is engulfed at this point.
Sad. It must have wooden trusses to burn like that. I used to assume most of those old buildings were made of stone but after touring some really old cathedrals I was surprised at how much wood they used in them.
The second largest church in Paris caught on fire just last month. The Washington post just published a story about churches in France that have come under attack recently