A human rights group has urged China to reveal information about people detained during crackdowns earlier this year on protesters in Tibet.
Amnesty International said in a report Wednesday that more than one-thousand people languish in prisons without China's government publicly acknowledging their whereabouts.
The London-based group also called for independent observers to be given free access to Tibet.
Anti-Chinese government riots that erupted in the Tibetan capital, Lhasa, on March 14th, sparked a harsh crackdown by Chinese troops.
The crackdown led to chaotic demonstrations at several stops on the international leg of the torch relay for the Beijing Olympics that begin in August.
Olympic officials say the torch will pass through Lhasa on Saturday.