North Korea appears to be back online

The internet seemed to be back up in North Korea on Tuesday, after experiencing a nearly “unprecedented” interruption, according to the BBC and other reports although Akamai said sporadic glitches occurred throughout the day (see chart.)

David Belson, [company]Akamai[/company] senior director of industry and data intelligence said the root cause of Monday’s multi-hour outage and shorter glitches on Tuesday remains unclear. He noted via mail that “it’s unlikely to be a physical cause [like a] fiber cut, a concerted effort on the part of the DPRK government (since that’s usually more of a go down/stay down scenario), or a router misconfiguration.”

Monday’s outage, reported by tech vendors including Dyn and CloudFlare, remains shrouded in mystery — sort of like the Sony hack that preceded it. Last week, the FBI blamed North Korea for breaking into Sony’s servers, taking corporate documents and releasing embarrassing internal emails. But some cyber security experts don’t believe that North Korea is the culprit.

That led Sony to make the controversial decision to pull The Interview, a comedy centered on a plot to assassinate North Korean leader Kim Jong Un.

Some suspect the interruption in North Korea is part and parcel of the “proportional response” to the Sony hack that President Barack Obama vowed last week. Others point to China — North Korea relies on China Unicom as its main pipeline to the rest of the world so that is obviously a possible single point of failure, Belson said although other than that there is no indciation that China is responsible for the outage.

A Chinese Foreign Ministry spokeswoman said reports of Chinese involvement had “no basis in reality,” according to the BBC.

north korea outage

Note: This story was updated at 3:04 p.m. PST with comments and data from Akamai.