"Regrettably, the report does not reflect the realities of the talks between Tehran and the IAEA," said Iran's Foreign Ministry spokesperson Saeed Khatibzadeh at a televised presser May 31.  

Khatibzadeh was addressing the International Atomic Energy Agency's latest assessment on Iran's nuclear program, released on Monday. The watchdog's report to its board of governors pointed out lack of progress in getting Iranian authorities to remove longstanding ambiguities over the presence of nuclear particles at three undeclared sites and possible military dimensions of the Islamic Republic's nuclear activities.  

However, to the Iranian side, the new report lacks "fairness and balance" and was drafted "with haste." Iran also fears that "pressure from Zionists and certain activists has diverted" the IAEA's technical mission, turning it political.  

Back in March, upbeat IAEA chief Rafael Grossi visited Tehran, where he convinced Iranians to accept a three-month road map on clarifying allegations of military dimensions. But Tehran's answers have not been credible, according to the report. A separate IAEA report found that Iran augmented its stockpile of 60%-enriched uranium, now at 43.1 kilograms, much more than the limit set by the Joint Comprehensive Plan of Action (JCPOA).