Newspaper was to publish letters to opponents in Monday edition , son and daughter say . Protesters outside newspaper offices clash with police , state - run Press TV reports . Hardliners criticize Karrubi for openly describing torture of prisoners . Human - rights groups accuse guards of conducting harsh interrogation .
Karrubi was to run response to opponents in Monday edition , son and reporter say . Protesters outside newspaper offices clash with police , state-run Press TV reports . Hardliners criticize Karrubi for openly describing mistreatment of detainees . Human-rights groups accuse guards of conducting harsh interrogations .