A UN body on Friday expressed deep concern over allegations of widespread torture in China and called on the country to fully probe rights abuses.

The United Nations Committee Against Torture, meeting in Geneva, also revisited the 1989 Tiananmen Square protests, urging the government to grant reparations and investigate the crackdown.

"The committee remains deeply concerned about the continued allegations, corroborated by numerous Chinese legal sources, of routine and widespread use of torture and ill treatment of suspects in police custody, especially to extract confessions or information to be used in criminal proceedings," it said in a report.

The committee also criticised China's handling of its relations with the Tibetan Autonomous Region, noting there had been "longstanding reports of torture, beatings, shackling and other abusive treatment, in particular of Tibetan monks and nuns."

Regarding the Tiananmen Square protests and crackdown, the committee said China "should conduct a full and impartial investigation" of the events.

It added that Chinese authorities should "provide information on the persons who are still detained from that period" as well as "offer apologies and reparation as appropriate and prosecute those found responsible for excessive use of force, torture and other ill treatment."

Earlier this month, the committee's chief rapporteur Felice Gaer had accused the Chinese of not providing sufficient information.

Chinese foreign ministry spokesman Qin Gang denied this and said earlier this month that "it is China's consistent stance that we oppose torture."

Gaer had said China had been unwilling to release data on individual cases by invoking its State Secrets Act to withhold information.