At least four people, including two firefighters, were killed and 47 others were injured in a powerful explosion at a bakery caused by a gas leak in central Paris.
France's Interior Minister Christophe Castaner told reporters at the scene "unfortunately the human toll is particularly serious."
He said 10 people are in critical condition and 37 others less seriously injured.
He paid homage to the courage of rescuers who saved the life of one firefighter who was buried under the rubble for two and a half hours.
Paris Mayor Anne Hidalgo, who was also at the scene, extended a "message of affection and solidarity" to the victims.
The explosion came amid heavy security in Paris and around France for yellow vest protests expected later Saturday.
(With AP inputs)