The Eiffel Tower has been evacuated after an anonymous phone caller made a bomb threat.
Nearly 1,400 people were cleared from the tourist attraction following a request from tower operators after the warning, a Paris police official said. Police then searched the monument with sniffer dogs and set up a security perimeter.
No explosives were found and the site is to be reopened, the official said .
French authorities have stepped up anti-terror measures in recent weeks amid heightened concern about threats to France over its military campaign against al Qaida-linked fighters in Mali which began more than two months ago.
The tower is occasionally evacuated because of such warnings - at least once last year and twice in 2011. The 1,063ft tower is one of the world's top tourist attractions, with millions of visitors a year.