Nearly 1,400 people were sent away from the tourist attraction following a request from tower operators after the warning, a Paris police official said. 

An announcement Saturday by the French president’s office that Abou Zeid’s death in late February has been “definitively confirmed” ends weeks of speculation about his fate.

Frankfurt’s airport closed, trains stopped running under the English Channel, and the French army was ordered to help clear roads – all because of a sudden dump of oddly late snowfall on Western Europe.

A judicial official said Saturday that the four, aged 22 to 37, are being investigated for criminal association with a terrorist enterprise.