Iran's nuclear negotiator Saeed Jalili will hold talks with E.U. foreign policy chief Javier Solana on Monday on the standoff over Tehran's atomic drive.
"There will be a telephone call today between Jalili and Solana," Iran's new foreign ministry spokesman Hassan Ghashghavi told reporters.
The U.S. had demanded that Iran meet a weekend deadline to respond to an international package of incentives aimed at persuading Tehran to freeze uranium enrichment amid warnings of new sanctions.
But Ghashghavi said: "Negotiations are an ongoing process and the question of a deadline is media speculation."
At the last meeting between Jalili and Solana on July 19 in Geneva, Solana had asked for a response in two weeks to the package drawn up by permanent U.N. Security Council members the U.S., Russia, China, U.K. and France, plus Germany.