Official statistics also show that at least 21 people have been killed.
Protests against the Government are entering their sixth day with citizens violently clashing with police as water cannons and tear gas being controversially used to suppress the crowds.
Tehran's deputy governor Aliasghar Nasarbhat has reportedly said that 450 people, almost half of all those arrested, were detained in Tehran where the protests first began last Thursday.
GETTYIran is entering its sixth day of protestsRelated articles
Iran’s state prosecutor Haji Reza Shakrami has said: "We are not currently providing statistical data on the total number of detainees”.
However, a large number of detainees have been seen being transferred to two prisons over the past few days.
US President Donald Trump has given his support for the protestors and warned the Iranian regime that “the US is watching” in a message on Twitter.
1 of 15
A victim receives treatment at a hospital
He said: “Furious protestors called on President Hassan