Iranian state television says authorities have arrested the daughter of former President Hashemi Rafsanjani together with four other family members for taking part in unauthorised protest rallies.
It says the arrests were made late yesterday. Today's report by Iran's official English language TV does not identify the four other family members or give more details.
State TV has shown pictures of Faezeh Hashemi, Rafsanjani's eldest daughter, speaking to hundreds of opposition supporters last week.
Rafsanjani has made no secret of his distaste for President Mahmoud Ahmadinejad, whose re-election victory in a June 12 vote was disputed by opposition candidate Mir Hossein Mousavi.