An Iranian nuclear scientist has been shot dead outside his home in Tehran, Iranian media sources say. The Isna news agency named him as Daryoush Rezaei, 35, adding that his wife was wounded. His identity has not been officially confirmed. In 2010, nuclear scientist Massoud Ali Mohammadi was killed by a remote-controlled bomb in Tehran. Iran blamed that attack on Israeli secret service Mossad. Israel has long warned about Iran's nuclear programme. Some reports said the latest attack involved assailants on a motorcycle, but this has not been confirmed. Isna said that Mr Rezaei was an expert with links to...