NEW : An Air Force official says no gunman was found and the site is `` secure '' The lock down was initiated about two hours earlier after ` ` With the help of the Tucson emergency services communities , Airmen . On-base parents were told to `` take the most direct route '' to locations where their children may be . Tucson agents , along with Air Force police , were dispatched to the Arizona air base to help . No shots were fired and no one was hurt , a Arizona military official says .
NEW : An Air Force official says no gunman was found and the site is `` secure '' The lock down was initiated about two hours earlier after ` ` With the help of the Tucson emergency services communities , Airmen . Tucson agents , along with Air Force police , were dispatched to the Arizona air base to help . No shots were fired and no one was hurt , a Arizona military official says .