VIENNA - The UN nuclear watchdog and Iran began talks on Monday ahead of a deadline later this week for Tehran to provide information about the development of detonators that can be used to help set off an atomic device.

The Iran-IAEA meeting took place a day before the Islamic Republic and six world powers on Tuesday start, also in the Austrian capital, a new round of negotiations on a broad diplomatic settlement of the decade-old nuclear dispute.

Reza Najafi, Iran's envoy to the International Atomic Energy Agency, made no comment as he arrived shortly after 3 p.m. (1300 GMT) at the UN agency's Vienna headquarters for Monday's meeting with senior IAEA officials.

Under a transparency and cooperation pact agreed between the two sides in November, Iran was to take seven practical measures by May 15 in a phased process to help allay international concern about its nuclear program.

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