Ecuador's ambassador to the UK, Ana Alban, has told ITV News she had "nothing to say" about the allegations made by her foreign minister that the London embassy was bugged with a hidden microphone:
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The world's first ever 'hole in the wall' was installed in Enfield, north London, on June 27 1967.
America says it has "identified preparations" for an attack similar to that which killed at least 86, including 30 children, in April.