US general Harold Greene killed by Afghan soldier --- A US general has been killed in an attack by an Afghan soldier at a British-run military academy near Kabul, US officials say. -- Maj Gen Harold Greene is the highest ranking US military official to have been killed since US-led combat operations in Afghanistan began. -- At least 15 soldiers - two British, several Americans and generals from Germany and Afghanistan were wounded. -- Officials said the Afghan soldier who opened fire had been shot dead. -- Gen Greene was the deputy commanding general for the Combined Security Transition Command, involved in preparations for the withdrawal of coalition troops at the end of the year. -- Correspondents say that the attack raises new doubts about Nato's ability to train Afghan forces as Western countries gradually withdraw. -- The Pentagon described "insider attacks" as a "pernicious threat". -- The attacker was a soldier who was recruited three years ago, Afghan defence ministry sources told the BBC. -- The incident is said to have occurred late morning or lunchtime after an argument between Afghans and an armed Afghan soldier. -- The Afghan soldier opened fire from a guard post at a large group of senior Afghan and international troops. -- By the time he had emptied the magazine of his US-issue M16 rifle, more than a dozen people had been shot, our correspondent says. -- The Afghan commander of the British-led officers' academy, Gen Gulam Sakhi, was among those wounded. -- The training academy, which first took cadets last October, is modelled on UK military academy Sandhurst. -- It will be the only British military presence in Afghanistan when operations end this year. - More, http://www.bbc.com/news/uk-28666287