Iran will announce an increase in uranium enrichment to 5%, a concentration above the limit set by its 2015 nuclear deal, an Iranian official tells Reuters, in a move signalling a deepening challenge to escalating US sanctions pressure.

Iran begins work on infrastructure to build advanced centrifuges at its Natanz facility but will adhere to its 2015 nuclear deal with world powers, the director of Iran’s Atomic Energy Organisation Ali Akbar Salehi says today.

One AP investigation uncovered an attempt to sell bomb-grade uranium to a real buyer from the Middle East, the first known case of its kind.