North Korea behind Sony attacks: FBI
The hack on Sony that saw thousands of internal files leaked online was carried out by North Korea, the FBI has said.
In an update on the ongoing cyber-attack on Sony Pictures, the agency said: "As a result of our investigation, and in close collaboration with other agencies, the FBI now has enough information to conclude that the North Korean government is responsible."
On Wednesday, controversial movie The Interview, which depicts the assassination of North Korean leader Kim Jong-Un, had its release cancelled after terrorist threats were made against cinemas that choose to show it.
"We are deeply concerned about the destructive nature of this attack", the FBI statement added.