Iran said on Monday it would further reduce its commitments under a 2015 nuclear deal if European parties failed to shield Tehran's economy from sanctions reimposed by the United States after Washington quit the accord last year.
"It is meaningless to continue unilateral commitments to the deal if we don't enjoy its benefits as promised by the deal's European parties," Foreign Minister Mohammad Javad Zarif said in a joint news conference with his Russian counterpart in Moscow.
Iran has said it will breach the deal's limits on its nuclear activities one by one, ratcheting up pressure on the countries who still hope to save it.