BRUSSELS (AP) — The European Union says it's in contact with signatories of the Iran nuclear agreement and will discuss with them what steps to take should the country ramp up uranium enrichment this weekend.

Iranian President Hassan Rouhani says Tehran will increase its enrichment of uranium to "any amount that we want" beginning on Sunday, ramping up pressure on European nations to save the faltering nuclear deal from the damage inflicted by U.S. sanctions.

Iran announced Monday that it had already breached the pact's limitations on stockpiles of low-enriched uranium.

A spokeswoman for EU foreign policy chief Federica Mogherini — a guarantor of the 2015 pact — said Thursday that "we've called on Iran to reverse these steps and to refrain from further measures that would undermine the nuclear agreement."