Iran’s president Hassan Rouhani warned European nations Wednesday that Tehran will "take the next step" in increasing its uranium enrichment closer to weapons-grade levels this coming Sunday if they do not offer a new deal by then, adding that they will increase it to "any amount that we want".

Speaking at a Cabinet meeting in Tehran, Rouhani said: "In any amount that we want, any amount that is required, we will take over 3.67.

"Our advice to Europe and the United States is to go back to logic and to the negotiating table. Go back to understanding, to respecting the law and resolutions of the U.N. Security Council. Under those conditions, all of us can abide by the nuclear deal."

Iran's nuclear deal currently bars it from enriching uranium above 3.67%, which is enough for nuclear power plants but far below the 90% needed for weapons.

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