Investigators in Paris say the fire at Notre Dame cathedral was likely sparked by an electrical issue.
Officials have not yet been cleared to investigate the cathedral itself due to safety concerns, but point to a 'short-circuit' as the most likely culprit. More than 40 workers have been questioned by investigators so far.
While the fire did massive damage, many relics were untouched, including two stained-glass rose windows, statues of the Apostles, and the cathedral's 8,000-pipe organ.
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