Obama: 'Sony made a mistake' by not releasing The Interview

President Barack Obama has vowed the US will respond after North Korea's alleged cyber-attack on Sony Pictures.

Mr Obama said the studio "made a mistake" in refusing to release a controversial satire depicting the assassination of North Korean leader Kim Jong-un.

He added: "We cannot have a society in which some dictator someplace can start imposing censorship in the United States".

On Friday, the FBI confirmed it believed North Korea was behind the hack, which saw sensitive studio information publicly released.