In the struggle for a renewal of the nuclear deal with Iran, the United States has expressed disappointment at the latest response from Tehran.
"We can confirm that we have received Iran's response through the EU," said a spokesman for the US State Department on Thursday evening in Washington.
"We are examining it and will respond via the EU, but unfortunately it is not constructive."
On August 8, the EU presented what it called a “final text” proposal for a new deal with Iran.
Iran had responded with proposed changes, to which Washington had responded with its own proposals - without publishing any details.
Then on Thursday, the spokesman for Iran's foreign ministry said Tehran had sent a new reply.
The spokesman for the US State Department now referred to this answer.
The EU foreign policy chief Josep Borrell was optimistic on Wednesday that a new edition of the nuclear agreement could be concluded "in the coming days".
The 2015 Iran nuclear deal was intended to limit Iran's nuclear program and ensure the country would not build nuclear weapons.
It was negotiated by the United States, China, Russia, Germany, France, Great Britain and Iran.
However, the United States unilaterally withdrew from the agreement in 2018 under then-President Donald Trump, after which Iran also gradually renounced its obligations under the agreement.
Trump's successor, Joe Biden, is aiming to revive the agreement, but the negotiations are extremely complicated.