Iran's nuclear negotiator Saeed Jalili will hold talks with EU 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 United States had demanded that Iran meet 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 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 UN Security Council members the United States, Russia, China, Britain and France, plus Germany.