Russia has said it is "no longer prepared to tolerate" any delays to its aid convoy entering Ukraine.
In a statement the foreign ministry said: "All excuses to delay sending aid have been exhausted. The Russian side has decided to act."
Reuters witnesses reported the trucks are still currently at the border but Russia warned against any attempts to disrupt them coming through.
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Gary Davies, 50, is believed to have known the victim, 56.
The couple, married for more than half a century, had recently retired to Mount Pleasant.
Four EU countries in eastern Europe refused to take part in the meeting