State Department Deputy spokesman Mark Toner said on Wednesday that the U.S. closely consults with Israel over its policy regarding Iran’s nuclear program.

Addressing the failure of the International Atomic Energy Age
ncy’s mission to Tehran this week, Toner said, "This is a disappointment. It wasn't all that surprising, frankly. But, you know, we're going to look at the totality of the issue here and the letter and what we think is the best course of action moving forward".

 "let's be very clear that we consult very closely with Israel on these issues,” he added. “We are very clear that we are working on this two-track approach. We believe, and are conveying to our partners, both Israel and elsewhere, that this is having an effect.”

Also on Wednesday, White House spokesman Jay Carney criticized Iran over the failure of the IAEA mission’s failure, saying it again showed Tehran's refusal to abide by its international obligations over its nuclear program.

“We regret the failure of Iran to reach an agreement this week with the IAEA that would permit the agency to fully investigate the serious allegation raised allegations, rather, raised in its November report,” said Carney.

“Unfortunately this is another demonstration of Iran's refusal to abide by its international obligations,” he added.

Carney also said the United States was continuing to evaluate Iran's intentions after it sent a letter to EU foreign policy chief Catherine Ashton last week, raising hopes for the prospects of renewed talks with world powers.

"This particular action by Iran suggest that they have not changed their behavior when it comes to abiding by their international obligations," Carney told reporters, expressing U.S. regret that the IAEA mission had ended in failure. 

Herman Nackaerts of the International Atomic Energy Agency said his team "could not find a way forward" in attempts to persuade Iran to talk about suspected secret work on atomic arms.

 Nackaerts said the talks in Tehran were inconclusive, although his mission .approached the talks "in a constructive spirit."

An IAEA statement published overnight already acknowledged the talks had failed.

Iran denies it has experimented with nuclear arms programs but has refused to cooperate with an IAEA probe on the issue for nearly four years.