AFPIran will begin injecting gas into centrifuges used to enrich uranium at its underground Fordo facility on Wednesday, rolling back another commitment under a 2015 nuclear deal.
President Hassan Rouhani said the step was reversible if world powers party to the accord upheld their commitments.
Enriched uranium can be used to make reactor fuel but also nuclear weapons.
This is the fourth step taken by Iran since July in response to US sanctions reinstated by President Donald Trump.
Under the accord, Iran agreed to limit its sensitive nuclear activities and allow in…
