Foreign ministry spokeswoman Marizeh Afkham said that a joint statement issued by Gulf Arab foreign ministers on Tuesday accusing Iran of interference in their countries' internal affairs was the same baseless rhetoric some of them had been uttering for decades.
"It is surprising that in the post-nuclear talks atmosphere, two or three of our southern neighbours... Try to continue the failed policy of considering the Islamic Republic of Iran a threat," she said.
Regional heavyweight Saudi Arabia and its Sunni-ruled neighbours accuse Shiite Iran of meddling in Bahrain, Iraq, Lebanon, Syria and Yemen.
Tehran counters that it is Riyadh and its allies who are destabilising the region though their support for rebels in Syria and their military interventions in Bahrain and Yemen.
Five of the six GCC states -- Bahrain, Kuwait, Qatar, Saudi Arabia and the United Arab Emirates -- have troops fighting against Shiite rebels in Yemen they accuse of being proxies of Iran. Only Oman does not.