Iran's Foreign Ministry Spokesman Ramin Mehmanparast says countries invited by Tehran to visit its nuclear sites can bring their own nuclear experts, Press TV reported.
Iran has invited envoys representing geographical and political groups in the International Atomic Energy Agency (IAEA) to visit the country's nuclear sites.
The invitation comes ahead of Iran's multifaceted talks with the P5+1 -- Britain, China, France, Russia, and the US plus Germany -- scheduled for late January in Istanbul, Turkey.
Mehmanparast made the remarks in response to the comments made by some of the invited countries, which said they do not possess the necessary expertise to visit Iran's nuclear facilities and experts should carry out the tour.
The Iranian official added that this invitation is a confidence building measure and a goodwill gesture on behalf of the Islamic Republic of Iran, and should be considered as an opportunity and a positive step.
The US and its allies accuse Iran of pursuing a military nuclear program, and used this pretext to pressure the UN Security Council to impose a fourth round of sanctions against the country's financial and military sectors in June.
Iranian officials have repeatedly refuted the charges, arguing that as a signatory to the Nuclear Non-Proliferation Treaty and a member of the IAEA, Tehran has a right to use peaceful nuclear technology.