REPUBLIKA.CO.ID, SYDNEY -- Australian Prime Minister Tony Abbott said on Wednesday that it was still unclear how many bodies from downed Malaysia Airlines Flight MH17 had arrived in the krainian city of Kharkiv and how many may have been left behind at the crash site.

Five refrigerated wagons containing 200 body bags reached Kharkiv on Tuesday after pro-Russian separatists agreed to hand over the plane's black boxes to Malaysian authorities and the bodies to the Netherlands, where many victims had lived.

The black boxes arrived in Britain on Wednesday.

Abbott said that based on an initial inspection of the remains in the train carriages, that it was unclear how many bodies may still be left behind in rebel-held territory.