US Secretary of State reaffirmed progress has been made in the ongoing nuclear talks between Iran and six world powers, IRNA reported.
Addressing the press on the sidelines of the Iran nuclear negotiations on the occasion of the resumption of full diplomatic ties between the US and Cuba, he said, 'We are working very very hard and we have some very difficult issues and we believe we are making progress and we gonna continue to work because of that.'
Kerry met bilaterally earlier in the day with his Iranian counterpart Mohammad Javad Zarif.
The nuclear talks in Vienna went into overtime as all seven parties are inching towards a final comprehensive agreement.