Sunday's episode of Game of Thrones has leaked online just days after reports emerged that hackers breached HBO's computer systems.

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Mashable reports that the episode, "The Spoils of War," surfaced on a forum devoted to the hit fantasy drama, where it was characterized by the poster as a "Gift from Pakistan." However, a network insider told Entertainment Weekly the leak isn't the result of the previously reported hack, but rather originated with Star India, one of HBO's international partners, which receives episodes in advance. The Verge confirmed the authenticity of the leak, which bears a "for internal viewing only" watermark.

It was revealed earlier this week that hackers illegally obtained 1.5 terabytes of data, which included "unspecified written material" for Game of Thrones, believed to be scripts, as well as upcoming episodes of Ballers and Room 104.

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This isn't the first Game of Thrones leak, as the first four episodes of Season 5 were released online before the season premiere, leading HBO to stop providing advance copies for review by journalists. A HBO subsidiary also released a Season 6 episode a day early.

Game of Thrones' seventh season airs Sunday at 9 p.m. ET/PT on HBO. Based on George R.R. Martin’s bestselling fantasy series A Song of Ice and Fire, the hit drama stars Peter Dinklage as Tyrion Lannister, Nikolaj Coster-Waldau as Jaime Lannister, Lena Headey as Cersei Lannister, Emilia Clarke as Daenerys Targaryen and Kit Harington as Jon Snow.