Smoke filled the air in Paris after a fire broke out at the historic Notre-Dame Cathedral around 6:30 p.m. on April 15. While the cause of the fire was not immediately apparent, French authorities say it may be linked to ongoing renovation work, according to BBC [1]. Paris Mayor Anne Hidalgo announced the news on Twitter [2], writing, "The Paris firefighters are currently trying to stop the flames. I ask everyone to respect the security boundaries."

The building was evacuated, with no immediate signs of anyone being injured, said André Finot, a spokesman for the cathedral. Built in the 12th and 13th century, the 850-year-old cathedral had its original spire removed in 1786, as it had weakened over time. See videos from onlookers and photos of the devastating event ahead.