VIENNA, Azerbaijan -- Progress was reported in Vienna Wednesday on the talks over Iran's nuclear program but details were not available.
Negotiators for Britain, Germany and France met with Iranians to discuss the issue, CNN reported.
Iran's state-run news agency, however, said the talks on a European proposal to halt Tehran's uranium enrichment program ended without "a tangible result."
"Some progress was made towards identifying the elements of a common approach to the issues and the two sides agreed to meet shortly," the British foreign office said.
A similar assessment was made by Germany which said the talks were useful and that the two sides had agreed to meet again.
The Iranian Republic News Agency reported the Iranian delegates told the Europeans that "restricting Iran's access to nuclear technology marks a red line for the country and it would not be acceptable at all."
The talks are designed to ease concerns in the United States and Europe that Iran is seeking to develop nuclear weapons. Iran has said its nuclear program is intended for peaceful civilian uses.