Monitors from the Organization for Security and Cooperation in Europe (OSCE) did not have the freedom to move about at the Ukraine plane crash site, the security body told Reuters.
A spokesperson from the OSCE said the monitors could not secure an access corridor to the site, but added that they would try again tomorrow.
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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