1,000 U.N. human rights experts say government tortured detained protesters . Government denies opposition detainees were abused into confessions . Iran is conducting a mass trial of about 100 Iranian defendants in its Revolutionary Court . Tehran conducting a trial of about 100 Iranian defendants in its U.N. . 3 people arrested , accused of fomenting unrest after 1979 election .
1,000 U.N. human rights experts say government tortured detained protesters . Government denies opposition detainees were abused into confessions . Tehran conducting a trial of about 100 Iranian defendants in its U.N. . 3 people arrested , accused of fomenting unrest after 1979 election .