(CNN)Three people, including two firefighters, have died and dozens more people were injured after a gas leak caused an explosion in Paris, emergency services in the French capital say.
Police had originally said four people had died, before revising down the death count.
“At this hour, 2 firefighters from the Paris fire brigade are dead. 10 people are seriously injured, including a firefighter. 37 people are in a state of relative emergency,” French Interior Minister Christophe Castaner tweeted.
“Profound sadness. Standing by the families of victims. The nation shares in their pain,” he added.
Spain’s Foreign Minister Josep Borrell Fontelles later said that a Spanish citizen died in hospital following the explosion, and that another Spaniard was injured.
Pictures from the scene, on Rue de Trevise in the 9th arrondissement of the French capital, showed smashed windows and scattered debris across the street, as fire crews evacuated people from apartments above the bakery.
“At this stage, we can tell the origin of the explosion is accidental, a gas leak, but we should remain prudent as an ongoing investigation will determine the causes of this,” Heitz said.
Castaner, who visited the scene with Prime Minister Edouarde Philippe and the city’s mayor Anne Hidalgo, wrote earlier on Twitter that the toll of victims “will be heavy.”
More than 200 firefighters were responding to the incident, Castaner wrote. “My first thoughts go to those injured and their loved ones,” he added.
The explosion occurred hours before gilets jaunes (yellow vest) protesters marched through the city for a ninth successive weekend, near the street on which the blast occurred.
Police had earlier advised the public to stay away from the area, and to make space for emergency vehicles.