The IAEA technical delegation would discuss technical issues with officials from Iran's Atomic Energy Organization, an unidentified Iranian official was quoted as saying.

The two sides are expected to work on the regulations under which inspections of Iranian nuclear sites will be carried out.

The Iranian official added that a delegation from IAEA will also arrive in Tehran on July 30 to visit Arak heavy water facilities in line with the latest agreements between Iran and the IAEA.

Due to the worry from the United States and other western countries about Iran's military aim at the plutonium produced by the still in building 40-megawatt heavy-water reactor in Arak, which would put into use in 2009, the IAEA's board of governors laid up its technical assistance for this heavy-water reactor last November.

Officials from Iran and the UN nuclear watchdog have negotiated in Tehran and Vienna to make a plan to solve the remaining problems in Iran's nuclear issue.

On March 24, the UN Security Council unanimously adopted a new resolution, the second punitive one, with tougher sanctions to pressure Iran to suspend its uranium enrichment activities.

However, an IAEA report in May said that Iran continued to resist the UN Security Council ban on enrichment and instead was expanding its activities.