French President Emmanuel Macron says he wants to see the fire-ravaged Notre Dame cathedral to be rebuilt within five years.

Macron said Tuesday in a televised address to the nation that "we will rebuild Notre Dame cathedral even more beautiful."

He added that "we can do it and once again, we will mobilize" to do so.

Macron, who also said "we have so much to rebuild," thanked firefighters and police and donors who are giving money for the renovation.

A Paris judicial official says investigators have questioned about 30 people after the fire at Notre Dame Cathedral.

He said most of them were employees working on the renovation of the monument.

The official, speaking anonymously on an ongoing investigation, said the cathedral's fire alarms sounded twice on Monday evening.

The first time, some people, including a fire official permanently working on the site, went to check under the roof and saw nothing. The second time it was already too late because the fire was too strong, the official said.

He added that 40 to 50 investigators are working on the case but are not allowed to enter the monument yet for safety reasons.

Earlier a Paris prosecutor said there's no evidence of arson and that they're working on the assumption that the blaze was an accident.

Remy Heitz says the investigation will be "long and complex."

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.

On Thursday, 16 religious statues were removed from the peak for the first time in over a century to be taken for cleaning and therefore escaped the blaze.

Speaking to BFMTV, Deputy Mayor Emmanuel Gregoire said first responders now trying to salvage the art and other priceless pieces stored in the cathedral.

The cause of the blaze isn't yet known, but scaffolding could be seen on the roof of the burning structure. The spire was undergoing renovation.

The peak of the 12th century cathedral is undergoing a 6 million-euro ($6.8 million) renovation project.

During an economic roundtable, President Trump said, "a terrible sight to behold. That is beyond countries, that's beyond anything. That's a part of our growing up, it's a part of culture. It's a part of our lives."

The Vatican has issued a statement about the "terrible fire" that has "devastated" Notre Dame Cathedral in Paris.

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."

The statement says 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

Daniel Cardinal DiNardo, Archbishop of Galveston-Houston and President of the U.S. Conference of Catholic Bishops issued this statement to the people of Paris. 

“The horrific fire that is engulfing the Cathedral of Notre-Dame de Paris is shocking and saddens us all, for this particular cathedral is not only a majestic Church, it is also a world treasure. Noble in architecture and art, it has long been a symbol of the transcendent human spirit as well as our longing for God.  Our hearts go out to the Archbishop and the people of Paris, and we pray for all the people of France, entrusting all to the prayers and intercession of the Mother of God, especially the firefighters battling the fire. We are a people of hope and of the resurrection, and as devastating as this fire is, I know that the faith and love embodied by this magnificent Cathedral will grow stronger in the hearts of all Christians.” 

Notre Dame was constructed in 1163 during the reign of King Louis VII and was completed in 1345. The cathedral is a world-wide Parisian icon and site of some of the most important moments in the history of France. Henry VI of England was crowned inside the cathedral in 1431 and Napoleon Bonaparte was crowned Emperor of France inside the cathedral in 1804.  

(The Associated Press, CBS News contributed to this report.)