File photo: In this June 6, 2018 frame grab from Islamic Republic Iran Broadcasting, IRIB, state-run TV, three versions of domestically-built centrifuges are shown in a live TV program from Natanz, an Iranian uranium enrichment plant, in Iran. (IRIB via AP)

TEHRAN, July 8 (Xinhua) -- The spokesman for Atomic Energy Organization of Iran announced that the Islamic republic crossed the limit of 3.67 percent, to higher level, in concentration of nuclear enrichment on Monday.

Behrooz Kamalvandi said that Iran will aim at production of 20 percent uranium enrichment in the next step if the signatories to the 2015 nuclear deal do not help Iran benefit from the economic privileges of the deal, according to Tasnim news agency.

On Sunday, Iran announced that it has started the measures to enrich uranium beyond 3.67 purity, a limit set by the nuclear agreement for Iran's enrichment concentration.

Iran has said that it will reduce its commitments to the deal unless the parties to the accord take "practical and concrete" measures to counter the anti-Iran economic sanctions of the United States after the latter's unilateral exit from the deal in May 2018.