What You Need to Know About the Sony Hacks

From North Korea to Lizard Squad, here's the latest.

Sony stopped short of calling it a hack and said the cause of the problem was under investigation

It was the latest blow to Sony, following an attack that disrupted its computer system and leaked confidential information online, including unreleased movies.

Here's what we know right now about both incidents:

Lizard Squad Claims Responsibility for PlayStation Disruption

The mysterious hacker or hacking collective known as "Lizard Squad" tweeted from its account "PSN Login #offline #LizardSquad."

In a statement to ABC News, Sony said "the ability to access our network services was temporarily impacted due to a distributed denial of service attack. We have seen no evidence of any intrusion to the network and no evidence of any unauthorized access to users' personal information."

North Korea Releases Statement

North Korea was considered by security officials a suspect in the large-scale hack against Sony last week, possibly due to "The Interview," an upcoming Sony comedy that centers on a journalist who has been given a secret mission to kill the country's reclusive leader.

Over the weekend, North Korea released a statement denying responsibility for the attack but said it may have been carried out by a person or group sympathizing with the country.

Sony did not respond to ABC News' request for comment, however, the technology website Re/Code reported that the company called the hack "unprecedented in nature," and an "unparalleled crime" that was likely carried out by "an organized group."