we spoke with bonji ohara, a security analyst and former navy captain with japan's self-defense forces. he says russia's buk surface-to-air missiles are capable of causing such an accident. >> translator: the buk missile has a range of 30 kilometers and can hit an object 22 kilometers in the air. aircraft flying at 10,000 meters are easily within range. i believe the former soviet republics were equipped with the missile. i can't deny the possibility that russia has provided such weapons to pro-russian separatists. >> he thinks there is a good possibility that the attack was the result of a misfire. ukraine's president says pro-russian militants have shot down two of his country's military planes recently. >> translator: government forces can distinguish civilian jets and even identity individual aircraft. i think the culprit fired the missile without proper information and just relied on radar to track it. i don't see any merit of government forces in either russia or ukraine attacking a civilian jet. >> ohara also points out that the tragedy will have an impact on how the internation