VIENNA (Reuters) - The U.N. nuclear watchdog rejected on Friday Iranian suggestions that it may have been partly to blame for the assassination of a nuclear scientist in Tehran last week, saying it did not know him.

VIENNA (Reuters) - The U.N. nuclear watchdog rejected on Friday Iranian suggestions it may have been partly to blame for the assassination of a nuclear scientist last week by leaking information about him, saying it did not know him.

MOSCOW (Reuters) - Once as highly regarded as cosmonauts, ballerinas and nuclear scientists, Russian circus stars have wowed generations.

Experts are investigating reports that a safe containing radioactive material was stolen from a site where Egypt plans to build its first nuclear power plant, government newspapers said on Friday.

UNITED NATIONS (Reuters) - Iran charged on Thursday that assassins who killed an Iranian nuclear scientist in Tehran last week may have used information obtained from the United Nations.

CAIRO (Reuters) - Radioactive material has been stolen from a nuclear power station on Egypt's Mediterranean coast that was the scene of violent protests last week, the state-run al-Ahram newspaper reported on Thursday.

The operators of the tsunami-stricken Fukushima nuclear power plant said Thursday they had passed an industrial camera into one of the wrecked reactors, in their first attempt to directly check the interior.

TOKYO (Reuters) - The operators of Japan's quake-crippled nuclear power plant looked inside one of the ruined reactors for the first time Thursday using an endoscope.

TOKYO (Reuters) - Japan's push to restart nuclear reactors shut for maintenance by proving their safety through stress tests and plans to let them operate for as long as 60 years have sparked an angry response from the public, wary of atomic power in the aftermath of the Fukushima disaster.

SALMON, Idaho (Reuters) - The radiation exposure of 16 workers at a nuclear research lab in Idaho stemmed from a failure to properly assess the risks posed by the handling of decades-old plutonium fuel cells, federal investigators concluded on Wednesday.

A high-level IAEA delegation visiting Iran January 29-31 aims to verify if Tehran's nuclear programme has a military dimension, the head of the UN nuclear watchdog said in an interview to be published Thursday.

LONDON (Reuters) - A backseat passenger on a motorcycle weaving through the crush of Tehran's morning traffic reaches out and places a small magnetic device on the door of a silver-grey Peugeot 405.

LONDON (Reuters) - A backseat passenger on a motorcycle weaving through the crush of Tehran's morning traffic reaches out and places a small magnetic device on the door of a silver-grey Peugeot 405.

TEHRAN (Reuters) - Iran said on Wednesday it was in touch with big powers to hold fresh talks soon but the European Union denied it, with Britain saying Tehran had yet to show willingness for negotiations addressing suspicions that it trying to develop atom bombs.

TOKYO (Reuters) - Japan will allow nuclear reactors to operate for up to 60 years in revised regulations on power plant operators, the government said on Wednesday, even as it looks to shift gradually away from atomic power in the wake of the Fukushima disaster.

TOKYO (Reuters) - Japan will allow extensions of up to 20 years to a planned 40-year limit on the life of nuclear reactors, in line with U.S. standards, the government said.

TOKYO (Reuters) - Japan will allow nuclear reactors to operate for up to 60 years in revised regulations on power plant operators even as it looks to shift gradually away from atomic power in the wake of the Fukushima disaster.

TOKYO (Reuters) - Japan will allow nuclear reactors to operate for up to 60 years in revised regulations on power plant operators even as it looks to shift gradually away from atomic power in the wake of the Fukushima disaster.

Iran warned Saudi Arabia on Tuesday to rethink an offer to make up for oil lost to world markets as a result of threatened curbs on its exports as diplomats said an EU embargo may be in force by July.

PARIS (Reuters) - French Socialist presidential hopeful Francois Hollande will only shut France's oldest nuclear power plant in eastern France during his 5-year term, if elected in May, one of the candidate's spokesmen told Reuters on Tuesday.