"We had constructive talks with each other," Solana said. "They presented proposals which they had worked on before. These proposals include positive steps and they also include some ambiguities that should be removed."
Larijani did not identify the "ambiguities" but said more talks on the issue would be required.
The offer was agreed last week by the five permanent members of the UN Security Council -- Britain, China, France, Russia, and the United States -- plus Germany. It offers incentives if Iran halts uranium enrichment but also threatens penalties if it defies international demands.
Solana was expected only to present the package and not to negotiate with Iranian officials.
The United States and its allies fear Iran is seeking to produce atomic weapons. Iran insists its program is for peaceful purposes.
Iran has said that energy shipments from the Gulf region would be disrupted if that country came under attack from U.S. forces.
(AFP, Reuters, AP)