Sergei Kiriyenko, the head of Russia's Federal Atomic Energy Agency (Rosatom), says construction of the Bushehr nuclear power plant in Iran does not threaten the nonproliferation regime.

A top U.S. energy official has praised Russia's decision to delay construction of the Bushehr nuclear power plant in Iran.

The head of the UN nuclear watchdog says implementing a plan to shut down North Korea's nuclear weapons program will take some time.

North Korea has assured a visiting European Union delegation that it will implement a landmark nuclear deal and completely dismantle its weapons program.

A top Iranian nuclear negotiator urged Russia on Friday to ship nuclear fuel this month for a Russian-built power plant, and promised to increase funding for the project after tense talks at which Russian officials complained of insufficient financing.

Iran says cuts in technical aid to Tehran by the UN's nuclear agency will not affect its uranium-enrichment work.

The crisis over North Korea's nuclear weapons programs was initiated in 2002, when U.S. officials said North Korea had admitted violating a previous agreement by pursuing a nuclear weapons program based on enriched uranium. Now that six-nation talks may be producing progress in eliminating Pyongyang's far more advanced plutonium-based program, Washington has softened its tone about uranium enrichment.

South Korean Foreign Minister Song Min-soon was in Moscow on Tuesday for talks he suggested would focus on efforts to ensure North Korea keeps a pledge to start dismantling its nuclear weapons program.

Iran's top nuclear negotiator has arrived in South Africa for talks on nuclear issues with President Thabo Mbeki.

U.S. Secretary of State Condoleezza Rice has responded to Iran's declaration today that it had no "reverse gear" on its nuclear program by saying that Tehran needs to halt weapons-related activities.

U. S. Secretary of State Condoleezza Rice has said the United States is on a diplomatic path to resolve Iran's refusal to stop its nuclear enrichment program, while Vice President Dick Cheney said the U.S. has taken none of its options off the table.

U.S. Vice President Dick Cheney has said that the United States and its allies must not allow Iran to become a nuclear power.