German Foreign Minister Frank-Walter Steinmeier will meet his Iranian counterpart Manouchehr Mottaki on Saturday to discuss Iran's nuclear issue, a Foreign Ministry spokesman said on Wednesday.

The talks will focus on "the questions of mutual and international interests," which are highlighted by the nuclear issue, said spokesman Martin Jaeger.

Iran has so far failed to give an official answer to the latest package of incentives in exchange for the suspension of its uranium enrichment. The proposals were presented by EU foreign policy chief Javier Solana on June 6, and international pressure is building up on the Central Asian state to respond positively.

Iranian leaders have given mixed reactions toward the six-nation initiative hammered out by five UN Security Council permanent members -- Britain, China, France, Russia and the United States -- and Germany.

Mottaki said last week that Iran was optimistic about the proposal, while the country's supreme leader Ayatollah Ali Khamenei vowed that his nation would not bow to western pressure.

Iran's nuclear crisis also tops the agenda of the EU-US summit taking place in Vienna on Wednesday.