Reports of clashes in the streets are beginning to come in:

Riot police battled with protesters Saturday as officials announced that President Mahmoud Ahmadinejad had won a landslide election victory. His opponent denounced the results as "treason"... NBC News reported "violent clashes" between rock-throwing protesters and police in the center of Tehran.... Several injuries were reported after police officers hit protesters with batons. Witnesses said some demonstrators appeared to have been arrested. Black-clad police also gathered around key government buildings and mobile phone text messaging was blocked in an apparent attempt to stifle one of the main communication tools by Mousavi's movement.

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