French Interior Ministry official says Firefighters might not be able to save Notre Dame Cathedral.
There is a fire at the French capital's iconic Notre Dame Cathedral where part of the spire collapsed. The mammoth fire that destroyed the spire of Notre Dame Cathedral has spread to one of the church's landmark rectangular towers."It's not certain we'll be able to halt the spread toward the northern bell tower. If that collapses, you can imagine the extent of the damage," General Jean-Claude Gallet said, adding that 400 firefighters were battling the blaze.
The Vatican said: "The Holy See has seen with shock and sadness the news of the terrible fire that has devastated the Cathedral of Notre Dame, symbol of Christianity in France and in the world."
France's civil security agency says "all means" except for water-dropping aircraft were deployed to tackle the blaze.
The defense agency said those were unsuitable for fires like the one at Notre Dame because dumping water on the building could cause the whole structure to collapse.
Paris police say fighters are inside the cathedral working to put the flames out while others work from the exterior. Red smoke is pouring out of the cathedral.
French President Emmanuel Macron is treating the fire gutting Notre Dame Cathedral as a national emergency.
The Vatican is praying for firefighters "and those who are doing everything possible to confront this dramatic situation" on Monday.
It also expressed "our closeness to French Catholics and the population of Paris, and we assure our prayers for firefighters
The peak of the church is undergoing a 6 million-euro ($6.8m) renovation project.
Flames and black smoke were seen shooting on Monday from the base of the medieval church's spire.
A church spokesperson says the entire wooden interior of the 12th century landmark is burning and likely to be destroyed.
Notre Dame spokesperson Andre Finot told French media: "Everything is burning, nothing will remain from the frame."
A massive fire engulfed the roof of the cathedral in the heart of the French capital on Monday afternoon as Parisians watched in horror.
"This is really sad - the saddest thing I've ever stood and watched in my life," said British tourist Sam Ogden, a 50-year-old onlooker, who had come to visit the cathedral with her family.
Gasps and cries of "Oh my god" erupted around an hour after the fire first broke out when the top portion of the church's spire came crashing down.
"It looked tiny to begin with, then within an hour it all came down," Ogden added.
France 2 television reported that police were treating the incident as an accident.
According to AFP news agency, the fire was noticed at about 6:50pm local time (14:50 GMT).
The French capital's police department said no deaths have been reported from Monday's fire. The police department didn't say anything about injuries.