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 .
3 U.N. human rights experts say government tortured detained protesters . Government denies opposition detainees were abused into confessions . Iran conducting a trial of about 100 Iranian defendants in its Revolutionary Court . 1,000 people arrested , accused of fomenting unrest after June 12 election .