PHOTOS: Massive fire breaks out at the historic Notre Dame Cathedral in Paris; firefighters tackle blaze

Hidalgo tweeted: “A terrible fire is underway at Notre Dame Cathedral in Paris. The fire brigade are trying to control the fire. We are mobilized locally in close connection with church authorities. I ask everyone to respect the security perimeter.”

Paris Mayor Anne Hidalsgo described the incident as a “terrible fire”. Image: Twitter (@ksj_mm)