The United States would seriously review any new Iran proposal on its nuclear program, said U.S. State Department on Tuesday, after Tehran said it is ready to reengage with major powers on its nuclear program.

"We would review any proposal that they give us seriously and in this period of mutual respect. We would welcome the Iranian government's constructive response to the P5+1, to their April 2009 invitation to meet face-to-face," spokesman Ian Kelly told reporters at the daily press briefing.

Kelly's remark came after Iran's nuclear negotiator Saeed Jalili reportedly said earlier Tuesday that Iran has developed a revised set of proposals and is ready to talk with world powers on its nuclear issue.

Senior diplomats from the so-called P5+1, namely the United States, Russia, China, Britain, France and Germany, would meet Wednesday in Frankfurt on Iran's nuclear issue.

Kelly said the Obama administration has not received from Tehran any new proposal and any answer to the initiatives proposed by the six powers in April, hinting that Iran has attempted to ease international pressure before the P5+1 Frankfurt meeting and the UN General Assembly.

"We're prepared to respond to some kind of meaningful response... The offer of the P5+1 remains on the table. And we can respond to that when they respond officially," said Kelly.

"As we saw in the most recent IAEA report, they are not complying with their obligations to the international community. And their behavior remains a matter of deep concern to us," said Kelly.

"We provided a path whereby they can become a full and respected member of the international community. And it's up to them as to whether or not they want to choose that path," said the spokesman.

(Xinhua News Agency September 2, 2009)