Tehran, July 29 (DPA) No reformist officials were among the 140 prisoners released by Iranian authorities, the Etemad newspaper reported Wednesday.

According to official statistics, more than 1,000 people were arrested in protests over alleged fraud in the June 12 presidential election. Of these, about 300 are still in jail.

At least 20 people were reported killed during the street protests.

Apart from demonstrators, journalists and dissidents, a number of former reformist ministers and parliamentarians were also jailed.

After increasing concern over the fate of the prisoners and an order by judiciary chief Ayatollah Mahmoud Hashemi Shahrudi to release detainees with no major charges on bail, 140 were freed Tuesday.

The Etemad daily reported that the majority of the freed prisoners were protesters but no former officials were among them.

According to the daily, the officials are said to have been transferred to the central Iranian city of Isfahan.

Iran's supreme leader, Ayatollah Ali Khamenei, ordered the closure of the Kahrizak detention centre in southern Tehran because it lacked the necessary standards for preserving detainees' rights.

Kahrizak, also known as 'Tehran's Guantanamo', is said to have been the main holding place for the detained protesters.