North Korea has offered to hold a joint inquiry with the United States into a cyber-attack on Sony Pictures, strongly denying US claims that it is behind it.
Its foreign ministry accused the US of “spreading groundless allegations”, which a joint inquiry would refute.
Without addressing Pyongyang’s idea, a US spokesman insisted North Korea must admit “culpability” .
Sony has cancelled the release of The Interview, which includes plans to kill the fictional Kim Jong-un.
The Interview had been due to open on Christmas Day. However, after anonymous threats against cinemas, Sony said it was considering releasing it “on a different platform”.
The FBI said on Friday that North Korea had carried out last month’s cyber-attack, in which script details and private emails were leaked.
The US defended its findings on Saturday, saying it was confident the North Korean government was “responsible for this destructive attack”.
“If the North Korean government wants to help, they can admit their culpability and compensate Sony for the damages this attack caused,” US National Security spokesman Mark Stroh said.
On Saturday, the North Korean foreign ministry said: “As the United States is spreading groundless allegations and slandering us, we propose a joint investigation with it into this incident.”
“Without resorting to such tortures as were used by the US CIA, we have means to prove that this incident has nothing to do with us.”
The statement said there would be “grave consequences” if the Americans rejected their inquiry proposal.
On Friday US President Barack Obama criticised the cancellation, saying he wished Sony executives had spoken to him before cancelling the release.
“We cannot have a society in which some dictator someplace can start imposing censorship,” he said, vowing to “respond” to the cyber-attack in a “manner that we choose”.
Responding to the US president’s comments, Sony Pictures chief executive and chairman Michael Lynton said the studio had not made an error in cancelling the release.
“We have not given in, we have persevered,” he told CNN.
The Interview saga
- 22 November: Sony computer systems hacked, exposing embarrassing emails and personal details about stars
- 7 December: North Korea denies accusations that it is behind the cyber-attack, but praises it as a “righteous deed”
- 16 December: “Guardians of Peace” hacker group threatens 9/11-type attack on cinemas showing film; New York premiere cancelled
- 17 December: Leading US cinema groups say they will not screen film; Sony cancels Christmas-day release
- 19 December: FBI concludes North Korea orchestrated hack; President Obama calls Sony cancellation “a mistake”.
A Sony statement said the decision had been based on “the majority of the nation’s theatre owners choosing not to screen the film”.
“Without theatres, we could not release it in the theatres on Christmas Day. We had no choice,” the statement added.
“It is still our hope that anyone who wants to see this movie will get the opportunity to do so.”
The movie features James Franco and Seth Rogen as two journalists who are granted an audience with Mr Kim.
The CIA then enlists the pair to assassinate him.
The film’s cancelled release drew criticism in Hollywood, with some calling it an attack on the freedom of expression.