Former Tehran Mayor Mohammad Ali Najafi has confessed to killing his second wife, Iranian media quote a prosecutor as saying.
Tehran prosecutor Mohammad Shahriari said on May 28 that Najafi "surrendered to police officers" and confessed to killing his wife over family issues, according to the hard-line Tasnim news agency.
Mitra Ostad, Najafi's second wife, was found dead at her home in the Saadat Abad neighborhood in northwestern Tehran earlier in the day, the official news agency IRNA reported.
It cited a police official as saying she had been shot several times.
Such gun violence is extremely rare in Iran.
Polygamy is legal under Islamic laws enforced in the country.
Najafi resigned last year after coming under criticism by hard-liners for attending a ceremony at which young girls were dancing. He cited health reasons for his resignation.
The website Ensaf News reported that Ostad called the news outlet on May 27 and was due to visit its offices for a formal interview on May 28.
Ensaf said that Ostad later postponed the interview, citing an upcoming trip.