Police in Paris partly evacuated Europe's busiest train station, the Gare du Nord, on Friday after an inactive explosive shell was discovered in a passenger's bag, sources said.
The shell was found as part of a random check at the station, which serves as a stop for the Eurostar from London, the Thalys from Belgium, Germany and the Netherlands, four suburban train lines, and two busy Paris metros.
A source close to the investigation said the man, who was arrested, was a soldier.
Arrivals and departures were temporarily disrupted before being resumed later Friday.
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