Majid Kavousifar and Hossein Kavousifar, his nephew, were hanged in front of Tehran’s Ershad judiciary complex, where they shot dead judge Hassan Moghaddas in his car in 2005.
The two were not political activists, but Tehran’s public prosecutor said Majid had believed the judge was corrupt. The prosecutor said the killers were also convicted of armed robbery and other murders.
Judge Moghaddas had presided over the jailing of seven dissidents in 2000 after they attended a conference in Berlin on Iranian reform.
Iran has one of the highest rates of execution in the world, but public executions are relatively rare.
Hoods over the heads of the judge’s killers were removed before the hangings, which took place from the back of tow trucks in front of a giant portrait of Moghaddas. Hossein looked pale and cried. His uncle smiled and waved goodbye to friends.
Onlookers in the street and on the roofs of houses chanted “Allahu Akbar” (God is Greatest) and took pictures with mobile phones. Some laughed.
“God, please give me back my son,” shouted Hossein’s tearful mother as she tried to reach his body. He was in his early twenties.
Prosecutor Saeed Mortazavi said: “the two were terrorists.”
Dozens of people have been executed for rape, smuggling and other offences in Iran in recent weeks. Most were arrested in a crackdown on “immoral behavior”, which began in April.
Iran hanged nine men on Wednesday for rape, armed robbery and other offences. Some 16 people were hanged in July.
Murder, rape, adultery, armed robbery, apostasy and drug smuggling are all punishable by death under Iran’s Islamic Sharia law, imposed since the 1979 revolution.
The number of executions doubled to at least 177 last year, according to Amnesty International. Since the beginning of 2007, at least 124 people have been put to death. Western rights groups have called on Iran to abolish the death penalty.
