North Korea, which is being accused of carrying the hacking attack on Sony Entertainment Pictures, witnessed a complete Internet outage that lasted for hours on Monday. However, the links were restored on Tuesday.
Meanwhile, the US officials said that Washington was not involved in the incident.
Dyn, an American company responsible for monitoring the Internet infrastructure, said the reason for the Internet outage is still not known but it could range from technological glitches to hacking attempt.
According to Dyn, the Internet links of North Korea were not stable on Monday and the connection later went completely offline.
The web links were restored at 0146 GMT on Tuesday.
The US officials, who were part of the investigations into the cyber attack on Sony, confirmed that the Obama administration had not taken any cyber action against Pyongyang.
Matthew Prince, CEO of US-based CloudFlare that protects websites from cyber attacks, said that as the Internet network of North Korea was back up, it “is pretty good evidence that the outage wasn’t caused by a state-sponsored attack, otherwise it’d likely still be down for the count”.
US President Barack Obama on Friday cited the findings of the probe by Federal Bureau of Investigation to accuse North Korea of being responsible for the cyber attack on Sony. However, North Korea denied the allegations and extended hands for conducting joint probe into the issue.