* IAEA head to visit Tehran this weekend
* Will work out details of IAEA inspection in next few weeks
(Adds quote, details)
GENEVA, Oct 1 (Reuters) - The head of the United Nations nuclear watchdog IAEA, Mohamed ElBaradei, is expected to go to Iran this weekend, a senior U.S. official said on Thursday.
Earlier Iran agreed at talks with six world powers on its nuclear programme to open its recently disclosed second enrichment site at Qom to supervision by the International Atomic Energy Agency in the next few weeks, European Union foreign policy chief Javier Solana and U.S. officials said.
"I understand that Mohamed ElBaradei will be in Tehran this weekend to work out the details," the seniorofficial told reporters, speaking on condition of anonymity. (Reporting by Lou Charbonneau; Editing by Jonathan Lynn)