U.N. nuclear officials say a two-day visit to Iran has failed to illuminate whether or not the country is pursuing technology for nuclear weapons. Officials from the International Atomic Energy Agency say they were denied access to key locations and records, including a facility where research on nuclear warhead designs was alleged to have taken place years ago. The U.N. team also failed to reach a deal with Iran on how to address questions over the country’s supposed nuclear research. In Washington, White House Press Secretary Jay Carney criticized Iran for the failure of the U.N.’s mission.

Jay Carney: “Unfortunately, it’s another demonstration of Iran’s refusal to abide by its international obligations. We will continue to evaluate, working with our P5-plus-1 partners, the letter in response that we received from the Iranians, in response to Lady Ashton’s letter about the possibility of engaging in talks. But this particular action by Iran suggests that they have not changed their behavior when it comes to abiding by their international obligations.”