Iran confirmed to Argentina on Saturday that it would cooperate to probe the 1994 bombing of a Buenos Aires Jewish center after charges that Tehran ordered the attack emerged, diplomats said.
The van bombing of the building of he Argentine Jewish Charities Federation, or AMIA, left 85 people dead and 300 others injured in the worst attack of its kind ever to strike the South American country.
Iranian Foreign Minister Mohammad Javad Zarif, closing a week of hectic diplomacy at the United Nations that included breakthrough contact with the United States, held talks on the bombing with his Argentine counterpart Hector Timmerman.
"Iranian authorities confirmed that the relevant authorities have approved the agreement," an Argentine diplomat told AFP.
But the deal, which follows talks between foreign ministers a year ago, will not come into force until a formal exchange of documents occurs, she said.
The two sides have still not resolved two key issues, including the naming of a investigatory commission, whose five members will be neither Argentine nor Iranian.
There has also been no agreement on a date for Argentine investigators to travel to Iran to interview suspects.
Argentina charges that Hezbollah, the Lebanese Shiite movement, carried out the attack under orders from Iran. Tehran's clerical regime denies the charges.