State Department officials monitoring events in Iran from Dubai have relayed back to Washington that Mousavi's Web site "Kalemah," his last link to the outside world, is completely shut down.
They also noted reports on Iranian Web sites alleging that jailed Mousavi supporters have been tortured in an attempt to force them into TV "confessions" of a foreign-led plot against the Islamic regime.
A newspaper with strong ties to the Iranian Revolutionary Guard Corps has published a letter calling on Iran's Justice Minister to prosecute Nobel laureate Shirin Ebadi for allegedly violating Islamic and constitutional law through her human rights advocacy.
And Iranian media are reporting that ten percent of the ballot boxes will be recounted in the presence of the Guardian Council's post-election committee and media, with the findings released to the public.
The U.S. officials in Dubai noted that former candidate Rezai's newspaper reports Karroubi has agreed to cooperate with the committee, while Mousavi has already rejected the Guardian Council's review and demanded a complete recount.
Iranian authorities have used a combination of warnings, arrests and the threat of police action over the last week to drive mass rallies off Tehran's street with smaller gatherings dispersed with tear gas and baton charges.
State media have said 20 people were killed in violence since the June 12 election — won by hardline President Mahmoud Ahmadinejad — and authorities accuse Mousavi of responsibility for the bloodshed. He says the government is to blame.
FOX News' James Rosen contributed to this report.