Updated

Hundreds of cheering supporters have gathered at the airport in Iran's capital to welcome its nuclear negotiators.

The crowd, mostly young students, called both Iran's foreign minister and its top nuclear negotiator "the Ambassador of Peace." They carried flowers and the Iranian flags.

The people chanted: "We are thankful in the capacity of eight years." That refers to the eight years of poor relations Iran had with the West under former hard-line President Mahmoud Ahmadinejad.

They also chanted: "No to war, sanctions, surrender and insult."

Tehran agreed Sunday to a six-month pause of its nuclear program while diplomats continue talks. International observers are set to monitor Iran's nuclear sites as the West eases about $7 billion of the economic sanctions crippling the Islamic Republic.