Russia has sent Britain an official refusal to extradite the chief suspect in the murder last year of a former Russian agent in London, news agency Interfax quoted sources in Moscow as saying today. “According to the country’s constitution, it is forbidden to extradite Russian citizens to foreign states,” a source said, explaining Moscow’s refusal to extradite ex-KGB agent Andrei Lugovoy to face trial for the murder of Alexander Litvinenko. Full Story