BEIJING, June 24 -- Chinese government on Tuesday released a television program about online terrorism by the East Turkistan Islamic Movement (ETIM).

According to the documentary, terror audio and videos are directly linked to terrorism and violence, including the attacks in Urumqi on April 30 at a railway station which killed three, and on May 22 that took 39 lives.

The program said audio and video materials that promote terrorism have been a feature of almost every terrorist attack.

A police investigation found such material published by ETIM.

The State Internet Information Office (SIIO) said the amount of audio and video materials put online by the ETIM, which is listed by the United Nations Security Council as a terrorist group, has shot up in the past few years.

In 2013 police tracked 109 pieces of terror-related audio and video content produced by the movement, compared with 32 in the previous year. The recordings were matched by a surge in attacks.

Besides promoting terrorism, ETIM videos also offer tutorials on how to make explosives and how to use weapons, according to the documentary.

The documentary indicates that the videos are produced outside China, with many uploaded on Turkish servers.

The Chinese government has vowed to strengthen its management of the Internet, telecommunication market and illegal publications.

The authorities will prevent terrorist materials produced overseas from being spread in China, delete such information online, punish website servers violating rules and urge Internet companies to meet their responsibilities.

More than 30 websites including Sina, Tencent, Baidu and Taobao signed a letter of commitment on Friday to meet their responsibilities regarding anti-terrorism and deleting terror information.

The documentary by China Central Television was made with the support of the SIIO, the Ministry of Public Security and the State Council Information Office.