Iran's chief nuclear negotiator Saeed Jalili said Thursday that the P5+1, which engaged in nuclear talks with the Islamic republic, should not make any miscalculations in the upcoming nuclear talks in Baghdad.

Addressing a conference in Tehran dubbed "Economy of Resistance, " Jalili said that Iran will attend the next round of nuclear talks with dignity and will defend its nuclear rights.

He warned some members of the P5+1, namely the United States, Britain, France, China and Russia plus Germany, to be careful about their remarks ahead of the nuclear talks slated for May 23 in the Iraqi capital, and do not make any miscalculations about Iran, implying that the Islamic republic will insist on its nuclear rights based on Non-Proliferation Treaty (NPT).

The world powers have spearheaded diplomatic efforts to persuade Iran to rein in its nuclear program, which Iran says is purely peaceful but UN and Western leaders suspect of its military purposes.

Jalili said that one of their big mistakes about Iran, since the Islamic revolution in 1979, was that "they have made miscalculations several times."

Iran is ready for talks with the P5+1 for cooperation based on Iran's inalienable nuclear rights, the nuclear negotiator stressed.

As for some members of P5+1 have said that the time for talks over Iran's nuclear issue is about to terminate, the official responded, saying: "I say that, today, the time for pressure strategy (on Iran) is about to end."

Pressures on Iran will further enhance Iranians' resistance and progress, he said, maintaining that "Today, the path that the Iranians have chosen for their progress is irreversible and they ( the West) have not been able to achieve their objectives via pressures."

The official IRNA news agency reported Wednesday that an Iranian deputy foreign minister asked the world powers to recognize the "legitimate rights" of his country to pursue " peaceful nuclear technology."

Iran will respond to the West in a positive manner in the upcoming nuclear talks if the latter continue talks in a realistic atmosphere, said Hossein Amir Abdollahian, Iranian deputy foreign minister for Arab and African Affairs.

Abdollahian expressed hope that the upcoming nuclear talks between Iran and the P5+1 in Baghdad will be a step forward.