A senior Iranian security official said on Sunday that the US response to Iran's seven conditions for reopening the Strait of Hormuz was "insufficient", according to Iranian state media.
Mohsen Rezaei, secretary of Iran's Supreme National Security Council, was quoted by state media as saying Washington had accepted some of the conditions while others remained unresolved, according to The National.
Mr Rezaei said: "We are no longer in the process of responding to the Americans. They have given their reply, and we consider it insufficient." He said Washington must clarify the issues that remained ambiguous to Tehran.
Gulf News reported that Mr Rezaei did not specify which conditions the US had accepted. The seven conditions have not been published in the reports reviewed.
Mr Rezaei also said Washington had approached Tehran through Pakistan, Qatar and Iraq over two months, according to The National, which cited state media. He said Iran sent the seven conditions about two weeks earlier.
Reuters reported that Iran presented the proposal during the UN General Assembly. Under it, Hormuz could be reopened and normal passage restored within seven days if the conditions were met. The US replied through Qatari intermediaries, Reuters reported.
No response from Washington to Mr Rezaei's remarks had been reported. The details of the US reply and which conditions it accepted come only from the Iranian side.
On Monday, Foreign Ministry spokesman Esmaeil Baghaei said Iran was still reviewing the US response. He said Iran would reply through intermediaries when the review was over, and that messages were still being exchanged, Reuters reported.
The Tribune in India reported Mr Baghaei as saying security would not return to the waterway while the US continued its naval blockade and "economic war". The newspaper's full wording of his remarks could not be verified.
Reuters reported that a central point of disagreement is Washington's insistence on addressing Iran's nuclear programme from the outset. Tehran says talks should first focus on reopening Hormuz and restoring security there.
Reuters said the war began on 28 February with US and Israeli strikes on Iran. Before the war, the strait carried about a fifth of the world's oil and liquefied natural gas, according to Reuters.
The National reported that Tehran effectively blocked the strait by attacking ships and laying mines, and that the US retaliated by blockading Iranian ports. Qatar and Pakistan, among others, have mediated between the two sides, according to Reuters.
