The Latest: No French trees big enough to rebuild roof

Smoke and flames fill the sky as a fire burns at the Notre Dame Cathedral during the visit by French President Emmanuel Macron in Paris, Monday, April

Smoke and flames fill the sky as a fire burns at the Notre Dame Cathedral during the visit by French President Emmanuel Macron in Paris, Monday, April

Firefighters tackle the blaze as flames and smoke rise from Notre Dame cathedral as it burns in Paris, Monday, April 15, 2019. Massive plumes of yello

Firefighters tackle the blaze as flames and smoke rise from Notre Dame cathedral as it burns in Paris, Monday, April 15, 2019. Massive plumes of yello

The Notre Dame cathedral is seen after the fire in Paris, Tuesday, April 16, 2019. A catastrophic fire engulfed the upper reaches of Paris' soaring No

The Notre Dame cathedral is seen after the fire in Paris, Tuesday, April 16, 2019. A catastrophic fire engulfed the upper reaches of Paris' soaring No

Flames and smoke rise as the spire of Notre Dame cathedral collapses in Paris, Monday, April 15, 2019. A catastrophic fire engulfed the upper reaches

Flames and smoke rise as the spire of Notre Dame cathedral collapses in Paris, Monday, April 15, 2019. A catastrophic fire engulfed the upper reaches

French President Emmanuel Macron walks by Notre Dame Cathedral during his visit to the site in Paris, Monday, April 15, 2019. A catastrophic fire engu

French President Emmanuel Macron walks by Notre Dame Cathedral during his visit to the site in Paris, Monday, April 15, 2019. A catastrophic fire engu

Flames and smoke rise as the spire on Notre Dame cathedral collapses in Paris, Monday, April 15, 2019. Massive plumes of yellow brown smoke is filling

Flames and smoke rise as the spire on Notre Dame cathedral collapses in Paris, Monday, April 15, 2019. Massive plumes of yellow brown smoke is filling

Firefighters spray water onto the facade of Notre Dame cathedral to stop the spread of a fire in Paris, Monday, April 15, 2019. Massive plumes of yell

Firefighters spray water onto the facade of Notre Dame cathedral to stop the spread of a fire in Paris, Monday, April 15, 2019. Massive plumes of yell

PARIS (AP) — The Latest on the fire that swept through Paris' Notre Dame cathedral (all times local):

8:45 a.m.

A French cultural heritage expert says France no longer has trees big enough to replace ancient wooden beams that burned in the Notre Dame fire.

Bertrand de Feydeau, vice president of preservation group Fondation du Patrimoine, told France Info radio that the wooden roof that went up in flames was built with beams more than 800 years ago from primal forests.

Speaking Tuesday, he said the cathedral's roof cannot be rebuilt exactly as it was before the fire because "we don't, at the moment, have trees on our territory of the size that were cut in the 13th century."

He said the restoration work will have to use new technologies to rebuild the roof.

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8:40 a.m.

Experts are assessing the blackened shell of Paris' iconic Notre Dame cathedral to establish next steps to save what remains after a devastating fire destroyed much of the almost 900-year-old building.

With the fire that broke out Monday evening and quickly consumed the cathedral now under control, attention is turning to ensuring the structural integrity of the remaining building.

Junior Interior Minister Laurent Nunez announced that architects and other experts would meet at the cathedral early Tuesday "to determine if the structure is stable and if the firefighters can go inside to continue their work."

Officials consider the fire an accident, possibly as a result of restoration work taking place at the global architectural treasure, but that news has done nothing to ease the national mourning.