Amanpour : Ayatollah 's credibility dented by huge mass protests in Tehran . Police say security forces are monitoring activists ' emails , SMS messages . Iran : Sources say Moussavi is not formally arrested or under house arrest . Government officials could lose their control in face of mass protests .
Amanpour : Ayatollah 's credibility dented by huge mass protests in Tehran . Police say security forces are monitoring activists ' emails , SMS messages . Iran : Government officials could lose their control in face of mass protests .