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Latest "Game of Thrones" episode leaked online

"Sophisticated" HBO hack

NEW YORK -- The upcoming episode of HBO's "Game of Thrones" has been leaked online. It is not, however, the result of a recent hack at the network, according to the cable network.

Media company Star India acknowledged Friday that it was the source of the leaked episode and said it is investigating how it happened.

Episode 4 of the show's seventh season is due to air Sunday.

The news comes just days after HBO said hackers had broken into its systems and stolen "proprietary information." HBO said that Friday's leaked "Game of Thrones" episode was a separate incident.

Star India, a subsidiary of 21st Century Fox, reaches more than 700 million viewers a month across India and more than 100 other countries.