A hacker group is threatening to release leaked data this weekend that it apparently obtained from HBO.

In an auto-response message sent to TheWrap, the hackers claim to have 1.5 terabytes of “sensitive data” that they will begin sharing this Sunday at 12 GMT. According to the author of the message, who uses the name “Mr. Smith,” more data will be released in the weeks to come.

“Hi, I am Mr. Smith,” the message read. “Yes, we hacked HBO and 1.5 TB of sensitive data and films is in our hands! We release the leak gradually every week (Sunday 12 GMT).”

Also Read: HBO CEO: 'We Do Not Believe That Our E-Mail System as a Whole Has Been Compromised'

The message closes with, “HBO is Falling…….”

The hackers previously claimed to have obtained several unreleased episodes of “Game of Thrones,” along with the script for this Sunday’s episode.

Also Read: Here's What Hackers Stole From HBO

In the 2014 Sony leak, hackers claimed to have stolen 100 terabytes of data, although only roughly 200 gigabytes were released.

HBO declined to comment on this latest message. When previously reached for comment about the hack, the network told TheWrap, “Due to an ongoing investigation, we cannot speak to any specifics.”

HBO boss Richard Plepler sent a memo to staff on Wednesday to assure them that the network does “not believe that our e-mail system as a whole has been compromised.”