North Korea threatened to attack rival South Korea if Seoul joined a new round of tightened UN sanctions.
Iran will return to talks with the UN nuclear agency next month, both sides said today, the latest push to seek a peaceful end to a dispute that has raised fears of a new Middle East war.
North Korea has made further progress in the construction of a new atomic reactor, the UN nuclear chief reported today, a facility that may extend the country's capacity to produce material for nuclear bombs.
The UN nuclear watchdog and Iran appear to have failed again in talks this week to finalise a deal to unblock an investigation into suspected atom bomb research in the Islamic state, a diplomatic source said.
The UN nuclear watchdog and Iran failed on Friday to strike a deal aimed at allaying concerns about suspected nuclear weapons research by Tehran, a setback in efforts to resolve the stand-off diplomatically before any Israeli or US military action.
Foreign ministers and the chief negotiator for world powers will meet next week to try to figure out how to break an impasse in negotiations over Iran's nuclear programme, after talks yielded no sign of progress.
A senior Iranian lawmaker accused the head of the United Nations' nuclear watchdog of passing confidential information about Iran's nuclear activities to Israel.
Satellite images indicate that buildings are being demolished and soil removed at Parchin, an Iranian military site the UN nuclear watchdog wants to visit, its chief said.
The UN nuclear watchdog said it had made no progress in talks with Iran on Friday to finalise a deal on resuming a long-stalled investigation into suspected nuclear weapons research by Tehran and it called the outcome "disappointing".
The UN nuclear watchdog will try to persuade Iran to address questions about its suspected nuclear weapons research at a meeting on Friday, more than two months after previous talks ended in failure.
Iran will resume talks with the UN nuclear watchdog in Vienna on May 13-14, state media quoted the Iranian ambassador to the body.
The United Nations nuclear watchdog confirmed today it will resume talks with Iran in mid-May, more than two months after the last meeting over concerns about the Islamic state's atomic activities ended in failure.
The UN nuclear watchdog chief said today he expected to sign a deal with Iran soon to ease investigation into suspected work on atom bombs, potentially brightening prospects for big-power talks with Tehran to stop a drift towards conflict.
The UN nuclear watchdog board censured Iran over mounting suspicions it is trying to develop nuclear weapons, but Tehran said the move would only strengthen its determination to press on with sensitive work.
Iran has yet to give an explanation over a small quantity of missing uranium metal from a research site, the UN nuclear watchdog said in a report that voiced concern over possible military links to Tehran's nuclear programme.
United States, China, Russia, France, Germany and Britain told Iran today to let international inspectors visit a military site where the UN nuclear watchdog says development work relevant for nuclear weapons may have taken place.
European Union governments could approve a new package of sanctions against Iran in the coming weeks, EU diplomats said today, over a UN report that Tehran has worked to design atom bombs.
World powers look set to overcome their differences and agree on a UN atomic agency resolution aimed at putting diplomatic pressure on Iran to address mounting fears about its nuclear programme, Western diplomats said.
The six world powers agreed a draft UN atomic agency resolution aimed at putting diplomatic pressure on Iran to address mounting fears about its disputed nuclear programme, diplomats said.
Russia criticized today the release of information in a UN nuclear agency report on Iran's nuclear programme, saying it would reduce hopes for dialogue with Tehran and suggesting it was aimed to scuttle the chances for a diplomatic solution.
Iran has started moving nuclear material to an underground facility for the pursuit of sensitive atomic activities, a UN nuclear agency report showed, a development likely to add to Western suspicions Tehran is trying to build a weapon.
Iran remains ready to engage in negotiations with world powers concerned about its nuclear programme, but only if the other parties show it due respect, its Foreign Ministry spokesman said today. Western countries called for new sanctions against Iran, but veto-wielder Russia indicated it would block new measures at the UN Security Council.
The UN atomic agency is seeking information from France about today's explosion at a nuclear waste treatment site in the country's south, its head said.
The UN atomic agency's 35-nation board adopted an action plan today to strengthen global nuclear safety following Japan's Fukushima accident six months ago, despite criticism from several states that the proposals had been watered down.
The UN atomic agency urged states to provide extra funding to strengthen global nuclear safety in the wake of Japan's Fukushima accident - a request some may balk at amid growing economic worries.
The UN nuclear watchdog suggested Japan consider widening an evacuation zone around a stricken nuclear plant as French President Nicolas Sarkozy was due to arrive on Thursday, the first leader to visit since a devastating earthquake and tsunami sparked the worst nuclear crisis since Chernobyl in 1986.
The head of the UN nuclear agency called for international action to prevent a repetition of Japan's nuclear disaster, saying the operator of the crippled plant failed to take sufficient safety measures.
A research center near Tripoli stocks uranium and other material that could be used to make a nuclear "dirty bomb" and Libya's rebels will need to secure it, a former senior UN inspector said today.
The UN atomic energy chief said he planned to fly to Japan to seek first-hand information of what he called a very serious situation at a stricken nuclear power plant in his home country.
Japanese engineers raced to restore a power cable to a quake-ravaged nuclear power plant in the hope of restarting pumps needed to pour cold water on overheating fuel rods and avert a catastrophic release of radiation
Japanese scientists have found measurable concentrations of radioactive iodine-131 and caesium-137 in seawater samples taken 30 km (18 miles) from land, the UN nuclear watchdog said.