Iran has continued to ramp up its nuclear program in violation of its 2015 agreement with world powers by further enriching uranium and installing new centrifuges, the United Nations’ nuclear agency said.

The fresh breaches of the nuclear deal came as tensions continued to climb in the Middle East, and US and Israeli officials issued warnings about Iran’s nuclear program.

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The International Atomic Energy Agency — in a confidential report obtained by Reuters and published Tuesday — said Iran has begun enriching uranium in its underground Natanz plant with a second cascade, or cluster, of centrifuges.

Iran recently installed a second cascade of advanced IR-2m centrifuges at Natanz to enrich uranium and will soon add a third. Iran was only allowed to use a less advanced type of centrifuge under the terms of the nuclear deal.

Read more at Times of Israel.