islamabad pakistani authorities order private television channel go air saturday police paramilitary crackdown islamist protesters capital suspension order pakistan electronic media regulatory authority violate media regulations show live coverage security operation statement regulator say state-run pakistan television continue broadcast air talk show discuss politics pakistani police use tear gas watercannon fight run battle stone-throwing islamist activists move clear protest religious hard-liners block main rout islamabad two weeks pakistan order tv channel go air crackdown islamist protest