Iran's nuclear negotiator said he is prepared for constructive talks with world powers, official Iranian media reported, according to Reuters.

Saeed Jalili expressed these sentiments to EU policy chief Javier Solana over the phone on Wednesday, Reuters reported.

An Iranian lawmaker said Iran will formally respond on Thursday to a U.N.-drafted plan to ship much of its uranium abroad for enrichment.

Iran has been considering the deal — which Western leaders hope will ease concerns over Tehran's controversial nuclear program — for a week now.

Lawmaker Mohammad Karamirad did not provide details, but Tehran's response is expected to be handed in at the U.N. nuclear agency in Vienna. Karamirad's remark was reported by the semiofficial ISNA news agency.

Another lawmaker, Alaeddin Boroujerdi, says Iran's top security body will make a final decision on the proposal later Wednesday.

Iran's state media have said the country will agree to the plan's general framework but will demand important changes.

The Associated Press and Reuters contributed to this report.