Pro-Mousavi demonstrators are met with militia violence after taking to the streets against Ahmadinejad regime
Iran's opposition has come out in force to mount some of the biggest street protests since June's disputed elections in a bid to overshadow official rallies marking the 30th anniversary of the storming of the US embassy in Tehran.
Thousands of demonstrators poured into the centre of the capital to defy riot police, revolutionary guards and Basij militiamen wielding clubs and kicking, as well as firing teargas and – according to some unconfirmed reports – live bullets.
Video footage posted on the internet showed supporters of Mir-Hossein Mousavi, the man who claims he won the presidential race, stamping angrily on images of Ayatollah Ali Khamenei, Iran's "supreme leader" and denouncing him as a "murderer". Others attacked the president, Mahmoud Ahmadinejad. Many wore wearing green scarves, ribbons or wristbands.
At the same time, government supporters burned US flags to commemorate the 1979 embassy takeover – a pivotal moment in the Iranian revolutionary