A hall at Gare de Lyon station in Paris was temporarily evacuated following an explosion.
The French railway company SNCF explained that the blast was caused by a CO2 cartridge used in devices to make carbonated drinks such as sparkling water inside a piece of luggage.
No injuries were reported, and train services were not disrupted.
According to the French newspaper Le Parisien, many travellers fled in fear of a potential attack, leading to brief chaos.
Authorities established a security zone but later confirmed there was no malicious intent involved.
The security zone was lifted, and the station hall was reopened shortly afterwards.
