In July 1999 Iran suffered its most serious unrest for years, as students staged demonstrations across the country calling for reform and press freedom.
Dozens of students were injured as students clashed with hardliners
On 9 July, police and right-wing vigilantes stormed a Tehran University dormitory which students were occupying.
The move sparked off days of street riots across the country, in which students were beaten and detained by police and hardliners. At least five were reportedly killed.
In this account sent to BBCPersian.com, Mohammad Reza Kasrani, a student at the time, recalls the dormitory attack and its ugly aftermath:
It was Friday evening 9 July when a friend told me about the attack on the students' dormitory in Tehran university, which had happened early in the morning.
I rushed there. God, it could not be described in any words: walls demolished, cupboards destroyed, students' belongings thrown out through the windows.
The dormitories were left almost completely destroyed
Even some students who had been sleeping or doing their morning prayers were thrown out through the windows from the second and the third floors.
A group of vigilantes, who are called "plainclothes", had attacked students who the day before were peacefully demonstrating in protest at the closure of a reformist newspaper by the judiciary.
During the five days after the attack, while the students staged demonstrations, the plainclothes attacked government buildings and set buses on fire, but it was the students who were later blamed for this vandalism.
The "plainclothes" attacked the students by sticks and batons and even fired tear gas.
Some students, like my friend Mehran Abdulbaqi, were arrested by them and not the police or security forces.
The police treated us harshly but never reacted to the plainclothes.
The students tried to avoid any reaction to the plainclothes and just stayed away from them, although some clashes occurred.
The students were not organised and their movement had no leadership, they just acted in an atmosphere filled with emotion and sensitivity.
All the students wanted was to bring those who attacked the dormitory to justice but, as the protest and unrest went on, more radical people joined the movement and slogans against the country's leaders were chanted.
They told [my parents] that I was going to be executed, then I heard my mother faint and then my father cried and begged them not to kill me
The unrest was brutally suppressed after five days.
It was on the fifth day that I was arrested by the agents of the intelligence ministry, while standing by the gate of Tehran University.
They put me in a cage, which was laid on the back of a pickup truck, and took me to a building which belonged to the police.
They took me out of the van when we reached the yard. From there to the door leading into the building soldiers were standing in rows on both sides, which reminded me of a "corridor of fear".
Then they beat me and two other students severely.
They told us to sit and stand up many times that our knees were locked and we fell on the ground; they beat us again.
Finally, they blindfolded us and took us to a hall inside the building.
They made me sit on a chair. Somebody came and opened my blindfold and showed me a student statement and asked me if I believed in what was said in that text.
Students fought pitched battles with hardliners and security forces on Iran's city streets
I said yes.
When he left, another one in a commando uniform came in. He beat me hard.
They only kept me one day in that building, and then I was transferred to Evin Prison and, later, a police detention centre for interrogation.
In that detention centre, they beat me on the soles of the feet with a cable for four continuous days and I was also subject to psychological torture for a month.
They told us that were would be executed.
At one stage, I heard the voices of my parents from another room.
They were told that I was going to be executed. Then I heard my mother faint and then my father cried and begged them not to kill me.
I heard them say to my parents: "For this bastard, you should not even read Koran after his death."
I said to God: "I am going to be killed for my country's freedom and for my religion, now my parents cannot even mourn for me."
'Atmosphere of terror'
Later, when I was freed, I found out that they played the recorded voice of my parents from another room.
They put me in a situation where I was totally convinced my parents were being tortured.
There are signs that the student movement is going to be revived again
Before I was arrested, I always believed that we could criticise the Islamic establishment by peaceful dialogue and that the officials would reform the system.
But after my arrest, my belief has completely changed. I have reached the conclusion that the officials are not thinking for reforms at all.
I think the student movement in Iran is living in very uncertain situation.
The government has been able to create an atmosphere of terror which has led to the students' frustration.
But I believe this phase would be a transitional one. There are signs that the student movement is going to be revived again.
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