Prime Minister Tony Abbott fears that while Russia might say the right things about an international investigation into the downed Malaysia Airlines flight 17, interference at the crash site will continue.

Mr Abbott described the crash site in eastern Ukraine as “chaotic” and reports of pro-Russian rebels meddling with the evidence – including the removal of bodies – as “outrageous”.

Russia has agreed to an investigation amid mounting scepticism about its willingness to co-operate with the international community.

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Mr Abbott remains concerned about security at the site.

“My fear is that Russia will say the right thing, but that on the ground interference with the site, interference with investigators, interference with the dignified treatment of bodies will continue,” he told ABC television on Sunday.

Foreign Minister Julie Bishop is flying to New York to campaign for an investigation backed by the UN.