The INSIDER Summary:

HBO was recently hacked in a cyber-security attack.

Several episodes of TV shows were reportedly stolen.

Now a full episode of "Game of Thrones" appears to have been leaked on Friday.

The episode, "Spoils of War," is scheduled to premiere on Sunday.

According to HBO, the episode leak wasn't related to the earlier hack, but came from Star India (an international distributor).



Early this week, HBO released a statement concerning a recent cyber-security hack indicating that full episodes of "Ballers" and "Room 104" had been stolen. In a new, separate leak, an unaired "Game of Thrones" episode has made its way online through HBO's India distributor, according to HBO.

Tatiana Siegel of The Hollywood Reporter tweeted early Friday morning, saying "sources inside HBO say [the leak was] NOT related to hack."

HBO confirmed the episode leaked through Star India with Vulture. Here is the statement provided to Vulture from Star India:

"This confirms the compromise of episode 4 of Game of Thrones Season 7, earlier this afternoon. We take this breach very seriously and have immediately initiated forensic investigations at our [end] and the technology partner's end to swiftly determine the cause. This is a grave issue and we are taking appropriate legal remedial action."

On Friday morning, a Reddit community called /r/FreeFolk reported that the full fourth episode of "Game of Thrones" season seven, "Spoils of War," was now available to download. "Free Folk" is a subreddit created by "Game of Thrones" fans who knew about leaks and spoilers as a place for discussion of said leaks.

Based on screenshots taken, the episode circulating is HBO's internal version of "Spoils of War."

Sansa Stark (Sophie Turner) on the upcoming "Spoils of War." Helen Sloan/HBO

The "Free Folk" subreddit was also the hub of discussion in 2016 when descriptions of season six episodes were being leaked ahead of the series' air date. The apparent leak of a full season seven episode marks the third time in "Game of Thrones" history that full sections of upcoming seasons have been stolen and placed online.

In 2015, four episodes were leaked ahead of the fifth season premiere. In 2016, as noted earlier, verbal descriptions of upcoming episodes were being shared ahead of their airing, and then a single episode ("The Door") was leaked online one day before its premiere on HBO.

The new 2017 hack, done by an anonymous person using the moniker "Little.Finger66," also included the theft of thousands of internal documents. One document already circulating was an early draft of the outline for episode four, "Spoils of War." Whether or not more content from the seventh season of "Game of Thrones" was stolen remains to be seen.

"Spoils of War" is officially premiering Sunday at 9 p.m. on HBO.

This article has been updated to reflect HBO's comment.