There were around four times as many public executions in 2011 as in 2010, a practice that Amnesty International said was used by the authorities to strike fear into society.
Hundreds of people are believed to have been sentenced to death in the past year, mainly for alleged drugs offenses. Iran continues to execute juvenile offenders -- a practice strictly prohibited under international law.
Amnesty International called on the international community not to allow tensions over Iran's nuclear program or events in the wider region to distract it from pressing Iran to live up to its human rights obligations.
"For Iranians facing this level of repression, it can be dispiriting that discussions about their country in diplomatic circles can seem to focus mainly on the nuclear," said Harrison.
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