VIDEOS: Attacks Kill More Than 100 In Paris

PARIS (CBSNewYork/AP) -- A series of unprecedented attacks on popular night spots killed more than 100 people in the deadliest violence to strike France since World War II, officials said. President Francois Hollande condemned it as a terrorist attack and pledged that France would stand firm against its foes.

The worst carnage was at a concert hall hosting an American rock band, where scores of people were held hostage and attackers hurled explosives at their captives. Police who stormed the building, killing two attackers, encountered a bloody scene of horror inside.

Hollande declared a state of emergency and announced that he was closing the country's borders. The violence spread fear through the city and exceeded the horrors of the Charlie Hebdo attack just 10 months ago.

You can follow the latest developments from CBS2 in the videos below:

Homeland Security: No Threat To U.S.

NYPD Assesses Local Security

Attacks Rock Paris Nightspots

Three Attacks Rock Paris

Dozens Killed, Hostages Held In Paris

Terror Expert Manny Gomez Weighs In

Security Expert Offers Insight

(TM and © Copyright 2015 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2015 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)