A hack of the computer network at Sony Pictures may have been retaliation for one of the studio's upcoming films, according to a new report.

As first reported by Re/code, the entertainment group is investigating the possibility that North Korean hackers may be to blame for Sony's company-wide computer outage.

The attack came a month before Sony Pictures is expected to release The Interview—the James Franco-Seth Rogan comedy depicting a CIA plot to assassinate North Korean leader Kim Jong-Un.

Last week, Sony employees were met with an ominous skeleton image on their PCs, from a group called #GOP (Guardians of Peace), alongside a message threatening to release "top secret" data if undisclosed demands were not met. The group leaked a large ZIP file with two lists, detailing the extent of the doxxing.

A number of Sony-related Twitter accounts were also breached. While the company repairs its system, the FBI is also investigating the incident, according to Reuters, which said technicians expect to restore email access today.

Workers were initially instructed to turn off their computers and disable Wi-Fi on mobile devices.

Sony Pictures and the FBI did not immediately respond to PCMag's request for comment.

Over the summer, an unofficial North Korea spokesman told The Telegraph that The Interview "shows the desperation of the U.S. government and American society."

This isn't the first time fingers have pointed at North Korea: In April 2013, South Korea blamed its northern relative for a cyber attack that crippled banks and TV stations in the country.

Weeks before, North Korea's official Twitter and Flickr accounts were hacked—reportedly as part of Anonymous's efforts to disrupt the country's Web presence.