Hackers leak more Game Of Thrones scripts and demand millions from HBO to stop leak.
Hackers have released a second batch of stolen HBO data online, including what appear to be draft scripts for five Game Of Thrones episodes, as well as company emails.
The hackers identified themselves as collective pseudonym "Mr Smith", sending HBO CEO Richard Plepler a video on Monday threatening further disclosures.
"We successfully breached into your huge network," the video said, according to the Hollywood Reporter, which together with other online magazines received the confidential information in an email from the hackers.
"HBO was one of our difficult targets to deal with but we succeeded (it took about 6 months)."
The hackers instructed Mr Plepler to pay a ransom of "our six-month salary in bitcoin", claiming they earned $12m to $15m (£9m-£11m) from blackmailing other organisations, to prevent further releases.
The video followed a file dump which included the script to an upcoming Game Of Thrones episode and a month's worth of emails from an HBO programming executive.
This is the second major HBO leak by the same hackers. Last month, 1.5 terabytes of data including scripts from GOT, episodes from popular TV shows Ballers and new comedy Room 104, were stolen and released.
HBO issued a statement to the Hollywood Reporter, saying: "HBO believed that further leaks might emerge from this cyber incident when we confirmed it last week. As we said, the forensic review is ongoing.
"While it has been reported that a number of emails have been made public, the review to date has not given us a reason to believe that our email system as a whole has been compromised."
Although this may constitute HBO's biggest leak to date, it falls short of the cyberattack inflicted on Sony in 2014, when hackers released thousands of personal emails and information including salaries and social security numbers belonging to nearly 50,000 past and present employees.