Iran's election authority said Monday it will probe allegations presidential elections were marred by ballot rigging as chaos following hardline President Mahmoud Ahmadinejad's declared victory continued for a third day.


Supporters of Iran's defeated presidential candidate Mir Hossein Moussavi protest on Sunday.
The country's government-funded Press TV reported that Iran's Guardian Council -- a body of top clerics and judges -- will investigate reformist opposition leader Mir Hossein Moussavi's claims.
Meanwhile, Moussavi was expected to ask followers to call off the demonstrations and appeal for calm, sources told CNN.

Moussavi's supporters Monday defied a government ban on their rallies, gathering for a demonstration at Tehran University.

Witnesses said crowds chanting slogans including "death to the dictator" were amassing at Tehran University despite authorities rejecting a request by Moussavi to hold a nationwide protest