Over 20 Chinese activists who were involved in the Tiananmen Square pro-democracy movement asked the United Nation’s top human rights body on Monday to an inquiry into Beijing’s fatal crackdown 30 years ago.

Wang Dan and 21 others, supported by the Chinese Human Rights Defenders, stated they had filed the compliant with the UN Human Rights Council, which starts a three-week session on June 24.

“We request the HRC investigate the gross violations of human rights and fundamental freedoms committed by the Chinese government during its military assault on peaceful protests,” they said.

They also want action over “the consistent pattern of human rights violations in persecuting Chinese citizens during the past three decades who broke the silence”, referring to the events of June 3-4, 1989.

The commemoration is still a taboo in China. Beijing has not allowed an independent investigation nor held a public inquiry, the statement stated.

Beijing is strongly supported by developing nations at the Human Rights Council, a 47-member panel that has never brought a resolution on China since being set up in 2006.

The council official contacted was not in state to give any details, stating that communications exchanged through the complaint process were confidential.

‘The massacre 30 years ago has not ended yet. The Chinese government even determined that the victims were criminals and a large number of exiles are still deprived of their right to return to their own country,” said Wang, who resides in the U.S.