Chinese religious sect Falun Gong successfully hijacked satellite TV broadcasts to homes in the Shandong province last week.
Viewers were surprised to find a banner reading 'Falun Gong is good' beamed across their screens during prime time on Tuesday.
At the same time, people in Beijing complained of picking up their phones and hearing a five-minute recorded message from Falun Gong attacking the Chinese regime's attempts to silence the group.
The phone messages contained details of torture which the group claimed had been carried out on its members currently in jail.
Security sources confirmed to the South China Morning Post that channels sharing the Sinosat-1 satellite, including most of China Central Television's 10 channels, and another 10 provincial channels, were hacked on Sunday night.
Analysts said that the group could have used a three-metre antenna mounted on a vehicle to avoid detection, and that the hacks highlight the Falun Gong's increasing sophistication.
This weekend, several channels denied any knowledge of the events, some of which ran for up to 15 minutes.
The Chinese state has a firm grip on communications in the country and has long outlawed Falun Gong.
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