No concrete deal was made at the meeting between Iran and the UN nuclear watch dog in Vienna, while both sides agreed on more talks to finalize a nuclear inspection document, officials said on Wednesday.

"Proposals were given by both sides, we decided both sides will work out carefully on the these proposals given today," Ali Asghar Soltanieh, Iran's envoy to the UN nuclear agency told reporters after their one-day meeting. "We have a very construction and intensive discussion today," he said.

"We must recognize that our best efforts have not been successful so far,"said Herman Nackaerts, the Deputy Director General of International Atomic Energy Agency (IAEA), who is leaving his position soon afterwards.

However, Nackaerts said he would continue to discuss the "structured approach" with Iran in the next round of talks.

IAEA has been striving hard in a year and half to strike a deal with Tehran over the document which could authorize investigations into Iran's disputed nuclear program. Endi