FBI concludes North Korean government responsible for Sony cyber attack

North Korea's leader Kim Jong Un visits a fishery station in this undated photo released Nov 19, 2014. The United States on Friday blamed North Korea for the devastating cyber attack against Sony Pictures, formally acknowledging the involvement of th
North Korea's leader Kim Jong Un visits a fishery station in this undated photo released Nov 19, 2014. The United States on Friday blamed North Korea for the devastating cyber attack against Sony Pictures, formally acknowledging the involvement of the Pyongyang government and saying the tools and infrastructure used in the attack were similar to previous activity from North Korea. -- PHOTO: REUTERS

WASHINGTON (REUTERS) - The United States on Friday blamed North Korea for the devastating cyber attack against Sony Pictures, formally acknowledging the involvement of the Pyongyang government and saying the tools and infrastructure used in the attack were similar to previous activity from North Korea.

The "destructive nature" of the attack, which led the big Hollywood studio to pull a movie depicting North Korea's leader amid threats, coupled with "its coercive nature," set it apart from previous attacks, the FBI said.