A large fire has broken out at the Basilique Saint Donatien in Nantes.

The fire, which has reportedly been underway since 10.30am has demolished three quarters of the Basilique’s roof and continues to be tackled by emergency services.

Ninety firefighters and aircraft were deployed but the flames quickly ravaged the rooftop, leaving just a shell of the rooftop. The blaze was brought under control after several hours.

In pictures: Fire breaks out at Basilique Saint Donatien Show all 6 1 /6 In pictures: Fire breaks out at Basilique Saint Donatien In pictures: Fire breaks out at Basilique Saint Donatien Basilica fire The fire at Basilica Saint Donatien was first reported at 10.30am (Monday 15th June) Elodie Stella/ Twitter In pictures: Fire breaks out at Basilique Saint Donatien Basilica fire At least 40 fire fighters were called out to tackle the blaze at Basilique Saint Donatien Elodie Stella/ Twitter In pictures: Fire breaks out at Basilique Saint Donatien Basilica fire The fire at Basilique Saint Donatien is believed to have been started by two welders carrying out work Elodie Stella/ Twitter In pictures: Fire breaks out at Basilique Saint Donatien Basilica fire Photos uploaded to social media show the roof of the 19th century basilica burning Maxime Claval/ Twitter In pictures: Fire breaks out at Basilique Saint Donatien Basilica fire The fire began just after morning Mass and everyone inside was quickly evacuated Reuters In pictures: Fire breaks out at Basilique Saint Donatien Basilica fire Ninety firefighters and aircraft were deployed to bring the fire under control, though flames quickly ravaged the rooftop AP

The fire started shortly after morning Mass and those inside of the building were quickly evacuated, Rev Benoit Bertrand of the Nantes diocese, told local television.

Initial reports speculate that the blaze has caused significant structural damage. Radio Cote D'Amour, a local radio station, has cited a police official who believes the fire may have been caused by welders working in the church.

Images, uploaded to social media, show the fire engulfing part of the building with smoke plumes visible far away from the incident.

A security perimeter has been established around the blaze.

Photos uploaded to social media show the roof of the 19th century basilica burning (credit: Maxime Claval/ Twitter) (Maxime Claval/ Twitter)

The Basilique is one of two in the city and dates back to the 19th century. It is dedicated to St. Donatien and St. Rogatien, two young martyrs who refused to renounce their Christian faith.