Iran said on Monday the US had rejected an offer from Tehran for more robust nuclear inspections in exchange for lifting
sanctions because
Washington is "not seeking dialogue".
Under the 2015
nuclear deal agreed to by Tehran,
Iran must ratify a document, known as the additional protocol, prescribing more intrusive inspections of its nuclear programme eight years after the deal was adopted.
"If the US is really seeking an agreement... Iran can make the additional protocol into law (in 2019) and (the US) at the same time bring a plan to the
Congress and lift all illegal sanctions," said foreign ministry spokesman Abbas Mousavi.