FILE - A picture taken on July 8, 2007 shows Iranian Reyhaneh Jabbari standing handcuffed at police headquarters in Tehran after she was arrested for the murder of a former intelligence official.
FILE - A picture taken on July 8, 2007 shows Iranian Reyhaneh Jabbari standing handcuffed at police headquarters in Tehran after she was arrested for the murder of a former intelligence official.

A United Nations human rights investigator has expressed shock at last weekend's execution of an Iranian woman convicted of murdering a man she said was trying to rape her.

The special rapporteur on Iran, Ahmed Shaheed, told reporters Monday that he had raised concerns with Iran's government about Reyhaneh Jabbari's case but had "not received a satisfactory reply with regard to the points raised, essentially about the fairness of the trial that she was given."

Jabarri, 26, was hanged Saturday in a Tehran prison.

Shaheed's comments come a day before he is to present a report on Iran to the General Assembly's human rights committee.

He said he had observed a "surge" in executions in the past year. 

Shaheed said at least 852 people, including eight juveniles, had been executed since June 2013. 

He also noted a widening of the range of offenses for which people could be put to death, including economic and political crimes.  

Shaheed also criticized Iran's record on freedom of information. He said about 35 journalists are under detention in the country.