Pro-Russian separatists said they welcomed international and Ukrainian experts coming to the site of the downed Malaysian airliner, denying reports they were preventing a search and rescue mission.
The Organization for Security and Cooperation in Europe (OSCE), a security and rights body, later said about 30 of its staff had arrived at the scene by helicopter.
A spokesman for the OSCE in Geneva said a "contact group" of diplomats from the body, Russia and Ukraine had met and spoken with separatist leaders by video link earlier.
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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