An Argentine Federal court on Thursday struck down an agreement between the South American country and Iran to jointly investigate the deadly 1994 bombing of a Buenos Aires Jewish community center that local courts blamed on Tehran, Reuters reported.
Alberto Nisman, a prosecutor who oversaw an investigation of the AMIA center explosion that killed 85 people, had argued in his appeal to the court that in negotiating the 2013 deal with Iran, the executive branch had overstepped into areas reserved for the judiciary.
The government said it would appeal the decision to Argentina's Supreme Court.
Thursday's ruling declared the agreement unconstitutional and ordered Argentina not to go ahead with it. The deal had been delayed anyway by Iranian reluctance to move forward in implementing it.
The AMIA bombing came two years after a group linked to Iran and the Lebanese militant group Hezbollah claimed responsibility for an attack on the Israeli embassy in Buenos Aires, which killed 29. Tehran has denied links to either attack.
In 2007, Argentine authorities secured Interpol arrest warrants for five Iranians and a Lebanese in the 1994 bombing. Thursday's court ruling reiterated Argentina's extradition requests.