The prime minister’s spokeswoman said: “While the investigation is still ongoing we cannot say categorically why the Russian jet crashed. But as more information has come to light we have become concerned that the plane may well have been brought down by an explosive device.
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Alistair Bunkall â€@AliBunkallSKY 39m39 minutes ago
Security source: The intelligence that prompted the UK government take this decision did not come from the wreckage of the plane.