Authorities received a complaint and police have “arrested four individuals for unauthorised publication of the fourth episode from season seven”.

All four unidentified suspects are or were at one point workers of a Mumbai-based company responsible for storing and processing the TV show’s episodes. Prime Focus Technology, a content company hired by the country’s Star India channel – where the show is broadcast – accepted the fault had come from inside their offices, and filed the complaint to the police.

Here's why they leaked it http://www.skillzah.com/2017/08/four-arrested-in-india-over-hbos-game-of-thrones.html