The famous Notre Dame cathedral in Paris is on fire, with one worker claiming that the blaze was deliberately set.

The roof of the historic building has completely collapsed.

“The cause is not yet clear, but officials say it could be linked to renovation work,” reports the BBC.

However, TIME columnist Christopher J. Hale tweeted, “A Jesuit friend in Paris who works in #NotreDame told me cathedral staff said the fire was intentionally set.”

Hale deleted the tweet within minutes after it attracted attention.

The Saint Sulpice church in Paris was deliberately set on fire earlier this year, although media reports downplayed the story.