An Iranian nuclear scientist was killed by a remote-controlled bomb in Tehran today. The victim was identified as Professor Massoud Mohammadi, who worked at Tehran University. He was killed near his home in a northern part of the capital by a booby-trapped motorcycle. A senior Interior Ministry official, Mehdi Mohammadifar, said the motive for the bombing was under investigation. "Apparently this man was a university professor who was killed close to his home this morning in an explosion," Mr Mohammadifar said. The official IRNA news agency said it was not yet clear how many people were killed in the blast,...