TEHRAN, Iran — Argentina’s new president, Mauricio Macri, has vowed that he will ask lawmakers to cancel the country’s 2013 memorandum with Iran to probe a deadly 1994 bombing.

The July 18, 1994, attack on the Argentine Israelite Mutual Association (AMIA) building in Buenos Aires killed 85 people. Over the lengthy 20-year investigation into the incident, Argentina has officially accused Iran of involvement three times, but Iran has always denied the accusations.

Under a memorandum agreed to in January 2013, Iran and Argentina agreed to establish a “truth commission,” comprised of five independent judges — none of whom would be either Iranian or Argentinean. The two sides announced that the commission would be tasked with discovery of the incident’s various dimensions. Following the agreement on the memorandum, which was struck in Ethiopia, the foreign ministers of Iran and Argentina announced in a letter to the secretary-general of Interpol that the two countries would pursue the issue themselves, so that Interpol would not need to take any other action.

An informed source in Tehran told Al-Monitor on condition of anonymity, “There had been secret talks between former Foreign Minister Ali Akbar Salehi and Argentinean Foreign Minister Hector Timmerman regarding the AMIA file. These negotiations were a starting point to solve the AMIA case.” The source said, “In the [initial] negotiations, held in Syria, representatives from the two parties discussed the different dimensions of the issue. Later, in Geneva, they held talks again.” Following several rounds of negotiations subsequently held in Ethiopia, the two parties reached agreement on a memorandum, which was signed by the foreign ministers in 2013. “The formation of the commission, composed of five international jurists, was the most notable part of the pact,” the source said, pointing to the provisions of the accord.