The Organisation for Security and Co-operation in Europe (OSCE) says it has urged Ukrainian separatists to seal off the site of the Malaysian Airlines crash in eastern Ukraine.
The OSCE said it had discussed the incident with the separatists over a video call.
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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