An Iranian appeals court has upheld a death sentence handed down to a 20-year-old university student.
Iran's opposition leader Mir Hossein Mousavi has vowed to continue his struggle against the government.
Iranian hardline authorities accused opposition leaders on Thursday of links to "foreign enemies."
Hundreds of thousands of government supporters rallied across Iran on Wednesday.
Iranian representatives called on Tuesday for "maximum punishment" against opposition demonstrators.
Iranian Supreme National Security Council ordered inspection of personal jet of Ayatollah Ali Khamenei.
A representative of Iran's Supreme Leader Ayatollah Khamenei said opposition leaders should be executed.
Iran FM Mottaki threatened Britain with a "slap in the mouth" if it did not stop interfering in Iranian affairs.
U.S. President Obama and German Chancellor Merkel condemned Iranian regime for violence against own citizens.
At least five opposition protestors were killed on Sunday in Iran.