IAEA director general Yukiya Amano will visit Iran on Monday and meet Tehran's chief nuclear negotiator Saeed Jalili, the UN nuclear watchdog said Friday.

Amano will "discuss issues of mutual interest with high Iranian officials," the International Atomic Energy Agency said in a statement.

The IAEA chief will arrive in Tehran on Sunday, joined by the agency's chief inspector Herman Nackaerts and its number two Rafael Mariano Grossi, it added.

A meeting between Iran and the IAEA, including Nackaerts, that was planned for Monday in Vienna was cancelled, an agency spokesperson told AFP.

The visit comes ahead of a crunch meeting in Baghdad on Wednesday between Tehran and world powers, to discuss concerns over Iran's suspected nuclear weapons drive.

Earlier this week, Iran and the agency met in the Austrian capital for their first talks in three months.

After the two-day meeting, described as "a good exchange of views," Nackaerts and his Iranian interlocutor, ambassador Ali Asghar Soltanieh, said they would meet again on Monday.

The IAEA wants Iran to address claims made in an extensive agency report in November that at least until 2003, and possibly since, it carried out "activities relevant to the development of a nuclear explosive device."

Tehran insists its nuclear programme is solely for peaceful purposes.