Reports blaming Russian-made Buk missile are rejected by spokesman for investigators

Investigators studying the downing of Malaysia Airlines Flight MH17 are "really getting closer" to finding out who was behind the attack, said Fred Westerbeke, the Dutch prosecutor leading a criminal investigation into the tragedy.

But a spokesman for the team told Russia Today that it's too early to confirm that fragments found in eastern Ukraine are from a Russian-made Buk missile system, countering previous media reports.