The Foreign Office has updated its guidance for people visiting France after at least 24 people were injured after an explosion at a building in Paris' Left Bank.
The blast ignited a fire that sent smoke soaring over monuments in the French capital and prompted the evacuation of surrounding buildings. The cause of the blast was not immediately known.
The façade of a building in the 5th arrondissement, or district, collapsed and emergency services were working to determine if anyone was still inside, police added. The explosion happened near the historic Val de Grace military hospital.