A former security guard at the U.S. Embassy in Norway has been indicted by prosecutors there on suspicion of espionage after he allegedly spied for Russia and Iran, state broadcaster NRK said Wednesday.

Refinery fires, housing explosions and infrastructure damage prompt Iranian officials to point to Mossad - though mismanagement and accidents remain possible causes.

Iran has agreed to allow a technical team from the U.N. nuclear watchdog to visit in the coming weeks to discuss "a new modality" on relations between the International Atomic Energy Agency and Tehran,

Tehran's latest satellite rocket test comes amid heightened Middle East tensions and ongoing nuclear negotiations in Europe.

Craig and Lindsay Foreman, both 52 and from East Sussex, have been charged with espionage, which they deny, after being arrested in Iran while on a round-the-world trip in January.

Iranian government offices, banks and businesses in the capital province of Tehran were shut down on Wednesday due to an intense heat wave and the need to conserve energy.

Iran is willing to return to the negotiating table with the U.S., "the sooner the better," but must be convinced the talks aren't cover for further military action, Tehran's nuclear negotiator Kazem Gharibabadi said on Wednesday.

Despite promises by the authorities, some of those transferred from Evin Prison in Tehran say they continue to face difficulties such as overcrowded cells, lack of beds and air conditioning, limited number of toilets and showers, and insect infestations.

"U.S. destroyer 'Fitzgerald' attempted to approach waters under Iran's monitoring in a provocative move", Iranian state TV said, adding that a Navy helicopter quickly approached the destroyer and issued a stern warning to leave the area.