Iran's security forces have arrested two more Reformist politicians amid deadly street riots over the results of the country's hotly-contested presidential vote.

Two other leading reformist politicians, Behzad Nabavi and Saeed Hajjarian have been detained Tuesday, following the earlier arrest of veteran Reformist politician Mohammad Ali Abtahi, advisor to defeated presidential candidate Mehdi Karroubi.

Mohammad Ali Abtahi served as vice president in Mohammad Khatami's government.

All the three have been accused of orchestrating the post-election violence in Iran.

Former prime minister Mir-Hossein Mousavi and Karroubi have questioned the outcome of the historic June 12 vote, and landslide victory of Incumbent President Mahmoud Ahmadinejad by a notable margin.

ZHD/DT