The United States has imposed new sanctions on North Korea as part of its first response to the cyber attack on Sony Pictures.
The FBI has blamed North Korea for the attack which leaked confidential data from Sony computers.
North Korea has denied the allegation but expressed fury over Sony's comedy The Interview, which features a plot to assassinate leader Kim Jong Un.
The United States has imposed new sanctions on North Korea in its first response to the cyber attack on Sony Pictures.
The sanctions, authorised by President Obama, targets three North Korean organisations as well as 10 individuals.
The FBI has blamed North Korea for the attack which leaked confidential data from Sony computers - an allegation Pyongyang has strongly denied.
"The order is not targeted at the people of North Korea, but rather is aimed at the government of North Korea and its activities that threaten the United States and others," President Obama wrote in a letter to House of Representatives and Senate leaders.
US sanctions against North Korea are already in place over the country's nuclear programme.
North Korea's dispute with the US over computer hacking took a new twist when the communist state lost Internet access for several hours.
A hacker group who claimed to be behind a cyber attack on Sony Pictures have posted a message online apparently mocking the FBI.
Events company Secret Cinema is planning to screen a film in protest at what they have called the 'censorship' of The Interview.