Preliminary investigation concludes missile was from a Russian - made system , official says . U.S. intelligence has concluded that pro - Russian separatists have a Buk system , official says . The initial assessment also suggests separatists thought they were shooting at a Ukrainian military transport plane . ` ` All the reports are it was fired from inside eastern Ukraine , '' official says .
Preliminary investigation concludes missile was from a Russian - made system , official says . U.S. intelligence has concluded that pro - Russian separatists have a Buk system , official says . ` ` All the reports are it was fired from inside eastern Ukraine , '' official says .