Prime Minister David Cameron said it was vital for governments to work together to establish the facts of what happened in the Ukraine plane crash, which he described as an "appalling, shocking, horrific incident."
He said if it is found that the plane was shot down, then the international community must work together to hold those responsible to account.
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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