UPDATE 5:30 P.M. : 

Paris fire chief reports that structure of Notre Dame cathedral has been saved; the fire is not spreading to northern belfry.

A French official and the Paris fire chief say they think Notre Dame Cathedral's landmark rectangular towers have been saved from the fire that caused horrific damage.
  
Junior Interior Minister Laurent Nunez said late Monday that authorities remain "prudent" but are "much more optimistic" than earlier in the night.
  
Paris fire commander Jean-Claude Gallet said a major accomplishment of hundreds of firefighters was stopping the flames from spreading to the north tower belfry.
  
Gallet says two-thirds of Notre Dame's roofing "has been ravaged." He says one firefighter was injured.
  
He says fire crews will keep working overnight to cool down the structure.

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Firefighters are battling a massive blaze at the French capital's iconic Notre Dame Cathedral.
  
Flames and black smoke were seen shooting from the base of the medieval church's spire on Monday.
  
The peak of the church is undergoing a 6 million-euro ($6.8 million) renovation project.
  
French media quoted the Paris fire brigade saying the fire is "potentially linked" to the renovation work.

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