But the comments from Keyvan Imani, a member of the Iranian delegation, appeared to indicate that Tehran was not prepared to budge on enrichment
- at least going into the talks.
"Suspension - there is no chance for that," he told reporters gathered in the courtyard of Geneva's ornate City Hall, the venue of the negotiations.
The presence of Undersecretary of State William Burns at the talks - the first instance of the Americans attending such meetings
- had led to hopes Iran would compromise on suspension.
The enrichment issue is key because the activity can produce either nuclear fuel or the material used in the fissile core of warheads. Iran has defied three sets of U.N. sanctions demanding it cease its program, saying it has a right to its peaceful uses under the Nuclear Nonproliferation Treaty. But there is growing concern the Islamic Republic might want to generate the fissile core of warheads instead.
Recent Iranian statements suggest Tehran is looking to improve ties with the United States, with officials speaking positively of deliberations by the U.S. administration to open an interests section
- an informal diplomatic presence - in Tehran after closing its embassy decades ago.
Although the U.S. says the Geneva talks focus only on the nuclear issue, Iranian Foreign Minister Manouchehr Mottaki said Friday they could also result in agreements to open a U.S. interest-protection bureau and have direct flights between the two nations.
U.S. interests in Iran are now represented by the Swiss Embassy in Tehran.
Iran and the United States broke off diplomatic relations after the 1979 Islamic Revolution and hostage crisis at the U.S. Embassy in Tehran. Official contacts between the two countries are extremely rare.
Imani said Tehran had not yet received a proposal from the U.S. on opening a representation but would "study it positively" if it did.
But Imani downplayed the presence of Burns - although the Americans had previously said they would not sit with the Iranians on nuclear issues unless Tehran was ready to stop all enrichment activity.
"He (is just) a member of the delegation" of the six countries engaging Iran on the nuclear issue, he said.