4/27/11, Associated Press and BNO News:  An Afghan military officer opened fire at an air force base in the Afghan capital on late Wednesday morning, officials said, killing at least nine people and injuring others.  The shooting spree began around 10:25 am local time at an air force base at North Kabul International Airport, apparently after some sort of argument between the gunman and others at the base.  A statement from the NATO training mission confirmed eight coalition service members and one contractor were killed in the shooting, but gave no of other nationalities.  It is ISAF policy to defer casualty identification procedures to the relevant national authorities, it said.  Taliban spokesman, Zabihullah Mujahid, said the group was behind the attack.  Mujahid said the gunman, who was identified by some as a 50-year-old man, was killed during his shooting spree when he ran out of ammunition.  "While upon using up his ammo, the brave Mujahid (Muslim fighter) laid down his life when he was shot and martyred in the enemy's subsequent fire."  Coalition casualties have been rising sharply in Afghanistan in recent years, with a total coalition death toll of 709 in 2010, making it the deadliest year for international troops since the war began in response to the 9/11/2001 terrorist attacks on the United States.