TEHRAN, July 5 (RIA Novosti) - Iran's top negotiator on the country's nuclear program said talks with the EU foreign policy supremo scheduled for Wednesday in Brussels had been postponed over a threat to the Iranian delegation from anti-Iran terrorist groups based in Europe.

Iran's Foreign Minister Manouchehr Mottaki had said earlier that Ali Larijani and Javier Solana would not hold talks, but had not given a reason for the delay.

"Reports came from Brussels about the activity of certain groups in Europe, supported by the Zionist regime [Israel] and a number of European states. This provoked concern over the safety of members of the Iranian delegation, so Ali Larijani's trip was cancelled," Iranian news agencies quoted a well informed source as saying Wednesday.

But the source said that after the EU had guaranteed the security of the Iranian delegation, agreement had been reached to hold the meeting in Brussels on July 11.