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A hand grenade-shaped belt buckle in the wake of a train passenger triggered major disruptions.
An official with Spain 's National Police said that the passengers were in a position to travel in the city of Barcelona.
The official was not authorized to be named in media reports.
"Everything returns to normal," the National Police said in a briefing explaining that disruptions in the long-distance and commuter trains in the Spanish capital had been due to the false alarm.
The search in the capital followed by the search for high-speed trains and railway tracks in the country's second largest city, Barcelona, after the central Sants station's security scanner identified an object like a possible explosive device inside a suitcase.
According to the police in the Catalonia region which tweeted an image of the scanned suitcase, the object turned out to be a belt buckle.
Spain's railway infrastructure managing company, ADIF, which handles security in train stations, did not immediately respond to questions about the suspicious case.
An AP reporter at the scene in Barcelona saw long queues of passengers waiting for rail traffic to resume.
A homegrown extremist cell killed 16 people in August last year in Barcelona and a nearby coastal resort.
—
Brito reported from Barcelona, Spain.
