Paris police: Security operation under way near Notre Dame
{{#rendered}} {{/rendered}}Paris police say a security operation is under way near Notre Dame Cathedral and are urging passers-by to stay away from the area.
The police department tweeted about the operation on Tuesday afternoon but did not provide any details. A police official would not provide further information.
Large numbers of police cars filled the area on the Ile de Cite island in the River Seine in the center of Paris.
{{#rendered}} {{/rendered}}Paris is under high security after a string of Islamic extremist attacks in recent years.