Flames rage from building near Paris opera

"Firemen are intervening, avoid the area," the Prefecture de Police said in a statement on Twitter.

It was not immediately clear what caused the fire.

Fire brigade spokesperson Florian Lointier said there were no casualties reported from the scene.

"There are no victims. When the fire-fighters arrived nobody made themselves known to them, be it in the offices or the dwellings," he said.

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