State of alert Tuesday afternoon in the heart of the capital.
Shortly after 4 p.m., a bomb threat reached the Arc de Triomphe.
The monument, open to the public, was immediately evacuated and a large security perimeter was set up around the Etoile roundabout with traffic interruption on the top of the Champs-Elysées.
The metro and RER stations located under the monument were also closed and emptied of their occupants.
The security system was lifted around 5.30 p.m., an hour and a quarter after the start of the alert.
Almost simultaneously, less than 2 km away, a security perimeter was set up on the Champ-de-Mars, after the discovery of an abandoned bag containing ammunition.
The bag was collected by technicians from the PP laboratory.
According to a police source, it contained dozens of large caliber bullets, all "operational".
The barrier device on the Champ-de-Mars was also lifted around 5:30 p.m.
An investigation was opened on the charge of prohibited transport of category B and C ammunition. The investigations were entrusted to the judicial police.
At the start of the evening, the link between these two alerts on two very symbolic sites in the capital had not been established.
Neither the origin of the bomb threat.