US Secretary of State John Kerry has said the treatment of MH17 victims' bodies remains "grotesque."
Kerry threatened to take "additional steps" against Moscow if the bodies were not returned soon.
He told NBC: "What's happening is really grotesque and it is contrary to everything President Putin and Russia said they would do."
Thousands of online users have taken to social media to call for the victims of the Malaysian airliner crash to be returned to loved ones.
United States intelligence officials admitted that they do not know who fired the surface-to-air missile that downed flight MH17.
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