U.S. suspects North Korea had help attacking Sony Pictures: source

North Korea has denied that it was behind the Sony attack and has vowed to hit back against any U.S. retaliation.

The people who claimed responsibility for the hack have said on Internet postings that they were incensed by the Sony Pictures film “The Interview,” a comedy about a fictional assassination of North Korean leader Kim Jong Un.

Because of the hackers’ threats, major U.S. cinema chains refused to show the film. Last week, Sony struck deals with some 320 independent theaters to distribute “The Interview” and also made the film available online.