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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.