Europe minister David Lidington has warned Russia that it risks "further damaging consequences" if it continues to escalate tensions in Ukraine.
Mr Lidington said that the entry of a Russian convoy into Ukraine is a "provocative act that violates previous understandings".
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Primary school teacher Lewis Siddall was killed in an 'unprovoked and senseless' act of violence, family and police say.
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The vehicle is captured on CCTV crashing through the shop window and hitting a browsing customer who was lucky not to be seriously hurt.