FILE PHOTO: An Iranian flag flutters in front in Vienna, March 4, 2015. REUTERS/Heinz-Peter Bader
DUBAI (Reuters) - Iran said on Friday it had taken a step to further downgrade its commitments to a 2015 nuclear deal with the world's most powerful nations, according to Iranian media, in retaliation to U.S. sanctions reimposed on Tehran.
Iran said on Wednesday it would begin developing centrifuges to speed up the enrichment of uranium, which can produce fuel for power plants or for atomic bombs. Tehran denies seeking nuclear weapons.
