TEHRAN - Iran has arrested two top elderly dissidents in a massive crackdown on the opposition protests against President Mahmoud Ahmadinejad's re-election, a press report said on Thursday.

Ebrahim Yazdi and Mohammad Tavasoli, veteran revolutionaries and leaders of Iran's Liberation Movement were arrested on Wednesday, the Etemad Melli newspaper reported.

Unofficial reports said Yazdi had been detained at a hospital emergency unit.

Iran has rounded up scores of reformists including high-ranking former officials and journalists since protests erupted over Ahmadinejad's landslide election win over his nearest rival Mir Hossein Mousavi in Friday's vote.

Hundreds of protestors have also been detained in Tehran - the epicentre of the protests - and in other cities.