A large fire broke out at the Notre Dame Cathedral in Paris Monday.
Crews are at the scene trying to get the fire under control. It's unclear how the fire started, but local media outlets reported police are treating it as an accident. Reports say the roof has collapsed and that flames are coming from the back of the cathedral.
The cathedral was mostly completed in the 13th century and is one of Paris' most popular attractions. The mayor of Paris tweeted shortly after the fire started, warning people to stay away from the area as firefighters battle the blaze.
France's president, Emmanuel Macron, also tweeted, saying he was sad to see this part of France burn. A spokesperson said he canceled a planned speech tonight because of the fire.
So far, no fatalities or injuries have been reported.
Additional reporting from Reuters and Newsy affiliate CNN.