TEHRAN – Domestic uranium enrichment and the effective removal of sanctions are Tehran's non-negotiable demands in the ongoing indirect negotiations with Washington, Iran's Foreign Ministry said on Monday.

Ministry spokesman Esmaeil Baghaei made the remarks at a weekly press conference in Tehran while elaborating on the country's demands in the Omani-mediated negotiations with the United States.

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Three rounds of the negotations have been held so far – two in the Omani capital Muscat on April 12 and April 26, and another in Rome on April 19.

Baghaei said the details of any negotiations should be within the framework of the general outlines already agreed on by the two sides, adding, "Thus, no agreement will be reached unless Iran's desired general framework is taken into account."

He stressed that technical consultations would be held simultaneously at each stage of the negotiations.

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He also underscored that "ending the sanctions effectively is a keyword" and that having access to Iran's "illegally and unjustly" frozen assets is among his country's serious demands in the talks.

Baghaei noted that a delegation from the International Atomic Energy Agency arrived in Tehran earlier in the day for technical talks with Iranian experts on a number of topics, including the safeguards issues.