Purveyor of TV shows such as Silicon Valley and more famously Game of Thrones – HBO has been hacked.

The company confirmed the breach to Entertainment Weekly this week but didn’t reveal what data was taken from its servers.

“We immediately began investigating the incident and are working with law enforcement and outside cybersecurity firms. Data protection is a top priority at HBO, and we take seriously our responsibility to protect the data we hold,” the firm told EW.

That said the hackers behind the breach claim to have as much as 1.5 terabytes of data from HBO and recent uploads of upcoming episodes of Ballers and Room 104 seem to add a degree of validity to the claim.

The hackers also claim to have a script for an upcoming HBO series episode which EW believes to be for Game of Thrones.

While content uploads have been limited to Ballers and Room 104 for now, 1.5TB of data is a lot and hackers have threatened to release more soon.

This year is turning into a hacking fiasco for big-name content producers. Earlier this year Netflix suffered a similar breach and multiple episodes of Orange Is The New Black appeared online.

This is also not the first time Game of Thrones has unceremoniously appeared online. In 2015 the first four episodes of the season five appeared online before the official release. Those episodes were downloaded by pirates over a million times within the first 24 hours.