Ukrainian President Petro Poroshenko has said he will not tolerate interference in the work of international monitors and other experts investigating the Malaysian airliner disaster.
In a statement Poroshenko said monitors from the Organisation for Security and Cooperation in Europe had again been hindered by pro-Russian rebels in their work at the site.
He said: "We will not tolerate interference with the work of the commission and that those representatives of other countries do not have the possibility of conducting an objective investigation."
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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